diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/ResourceLocatorTest.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/ResourceLocatorTest.java
index 0ea317fca1a22..2f610a82cce42 100644
--- a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/ResourceLocatorTest.java
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/ResourceLocatorTest.java
@@ -61,6 +61,7 @@ public static void close() {
 
     @RegisterExtension
     static QuarkusUnitTest testExtension = new QuarkusUnitTest()
+            .overrideConfigKey("quarkus.http.root-path", "/app")
             .setArchiveProducer(new Supplier<>() {
                 @Override
                 public JavaArchive get() {
@@ -155,4 +156,9 @@ public void testBeanParamsInSubresource() {
                 .then()
                 .body(is("first and second"));
     }
+
+    @Test
+    public void testRoot() throws Exception {
+        given().get().then().body(is("[app, ]"));
+    }
 }
diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorBaseResource.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorBaseResource.java
index 319833214901b..308a4a738be87 100644
--- a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorBaseResource.java
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorBaseResource.java
@@ -5,8 +5,10 @@
 import java.lang.reflect.Proxy;
 import java.util.List;
 
+import jakarta.ws.rs.GET;
 import jakarta.ws.rs.Path;
 import jakarta.ws.rs.PathParam;
+import jakarta.ws.rs.Produces;
 import jakarta.ws.rs.core.Context;
 import jakarta.ws.rs.core.UriInfo;
 
@@ -18,13 +20,21 @@ public class ResourceLocatorBaseResource {
 
     private static final Logger LOG = Logger.getLogger(ResourceLocatorBaseResource.class);
 
+    @GET
+    @Produces("*/*")
+    public String getDefault(@Context UriInfo uri) {
+        LOG.debug("Here in BaseResource");
+        List<String> matchedURIs = uri.getMatchedURIs();
+        return matchedURIs.toString();
+    }
+
     @Path("base/{param}/resources")
     public Object getSubresource(@PathParam("param") String param, @Context UriInfo uri) {
         LOG.debug("Here in BaseResource");
         Assertions.assertEquals("1", param);
         List<String> matchedURIs = uri.getMatchedURIs();
         Assertions.assertEquals(2, matchedURIs.size());
-        Assertions.assertEquals("base/1/resources", matchedURIs.get(0));
+        Assertions.assertEquals("app/base/1/resources", matchedURIs.get(0));
         Assertions.assertEquals("", matchedURIs.get(1));
         for (String ancestor : matchedURIs)
             LOG.debug("   " + ancestor);
diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource.java
index febacd2ff7ef2..dfb0d717642ef 100644
--- a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource.java
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource.java
@@ -22,7 +22,7 @@ public String doGet(@Context UriInfo uri) {
         LOG.info("Uri Ancestors for Subresource.doGet():");
         List<String> matchedURIs = uri.getMatchedURIs();
         Assertions.assertEquals(2, matchedURIs.size());
-        Assertions.assertEquals("base/1/resources", matchedURIs.get(0));
+        Assertions.assertEquals("app/base/1/resources", matchedURIs.get(0));
         Assertions.assertEquals("", matchedURIs.get(1));
         for (String ancestor : matchedURIs)
             LOG.debug("   " + ancestor);
@@ -41,8 +41,8 @@ public Object getSubresource2(@Context UriInfo uri) {
         LOG.info("Uri Ancestors for Subresource.getSubresource2():");
         List<String> matchedURIs = uri.getMatchedURIs();
         Assertions.assertEquals(3, matchedURIs.size());
-        Assertions.assertEquals("base/1/resources/subresource2", matchedURIs.get(0));
-        Assertions.assertEquals("base/1/resources", matchedURIs.get(1));
+        Assertions.assertEquals("app/base/1/resources/subresource2", matchedURIs.get(0));
+        Assertions.assertEquals("app/base/1/resources", matchedURIs.get(1));
         Assertions.assertEquals("", matchedURIs.get(2));
         for (String ancestor : matchedURIs)
             LOG.debug("   " + ancestor);
diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource2.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource2.java
index 637ca33eb0afc..da745c63579ec 100644
--- a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource2.java
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/resource/basic/resource/ResourceLocatorSubresource2.java
@@ -18,9 +18,9 @@ public class ResourceLocatorSubresource2 {
     public String doGet(@PathParam("param") String param, @Context UriInfo uri) {
         LOG.debug("Uri Ancestors for Subresource2.doGet():");
         Assertions.assertEquals(4, uri.getMatchedURIs().size());
-        Assertions.assertEquals("base/1/resources/subresource2/stuff/2/bar", uri.getMatchedURIs().get(0));
-        Assertions.assertEquals("base/1/resources/subresource2", uri.getMatchedURIs().get(1));
-        Assertions.assertEquals("base/1/resources", uri.getMatchedURIs().get(2));
+        Assertions.assertEquals("app/base/1/resources/subresource2/stuff/2/bar", uri.getMatchedURIs().get(0));
+        Assertions.assertEquals("app/base/1/resources/subresource2", uri.getMatchedURIs().get(1));
+        Assertions.assertEquals("app/base/1/resources", uri.getMatchedURIs().get(2));
         Assertions.assertEquals("", uri.getMatchedURIs().get(3));
         for (String ancestor : uri.getMatchedURIs())
             LOG.debugv("   {0}", ancestor);
diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/ResteasyReactiveRequestContext.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/ResteasyReactiveRequestContext.java
index 2248a8f7763ac..7e6d9ae949922 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/ResteasyReactiveRequestContext.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/ResteasyReactiveRequestContext.java
@@ -428,6 +428,9 @@ public String getPathWithoutPrefix() {
             if (!prefix.isEmpty()) {
                 // FIXME: can we really have paths that don't start with the prefix if there's a prefix?
                 if (path.startsWith(prefix)) {
+                    if (path.length() == prefix.length()) {
+                        return "/";
+                    }
                     return path.substring(prefix.length());
                 }
             }
diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/jaxrs/UriInfoImpl.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/jaxrs/UriInfoImpl.java
index 987bbf2838113..7dd314457a2dc 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/jaxrs/UriInfoImpl.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/jaxrs/UriInfoImpl.java
@@ -55,6 +55,9 @@ public String getPath(boolean decode) {
         if (prefix.isEmpty())
             return path;
         // else skip the prefix
+        if (path.length() == prefix.length()) {
+            return "/";
+        }
         return path.substring(prefix.length());
     }