diff --git a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/devmode/ConfigDescriptionsManager.java b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/devmode/ConfigDescriptionsManager.java
index 697bdf4274f3e..98becec8c3602 100644
--- a/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/devmode/ConfigDescriptionsManager.java
+++ b/extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/devmode/ConfigDescriptionsManager.java
@@ -297,7 +297,7 @@ private String ensureQuoted(String part) {
     }
 
     private boolean isQuoted(String part) {
-        return part.charAt(0) == '\"' && part.charAt(part.length() - 1) == '\"';
+        return part.length() >= 2 && part.charAt(0) == '\"' && part.charAt(part.length() - 1) == '\"';
     }
 
     @Override