diff --git a/extensions/jdbc/jdbc-oracle/runtime/src/main/java/io/quarkus/jdbc/oracle/runtime/graal/ObjIdSubstitutions.java b/extensions/jdbc/jdbc-oracle/runtime/src/main/java/io/quarkus/jdbc/oracle/runtime/graal/ObjIdSubstitutions.java
new file mode 100644
index 00000000000000..9f3881b5805bbe
--- /dev/null
+++ b/extensions/jdbc/jdbc-oracle/runtime/src/main/java/io/quarkus/jdbc/oracle/runtime/graal/ObjIdSubstitutions.java
@@ -0,0 +1,44 @@
+package io.quarkus.jdbc.oracle.runtime.graal;
+
+import java.security.SecureRandom;
+
+import com.oracle.svm.core.annotate.Alias;
+import com.oracle.svm.core.annotate.InjectAccessors;
+import com.oracle.svm.core.annotate.TargetClass;
+
+/**
+ * Substitutions required when `jdbc-oracle` is combined with `jdbc-h2`.
+ */
+@TargetClass(className = "java.rmi.server.ObjID")
+public final class ObjIdSubstitutions {
+
+    @Alias
+    @InjectAccessors(SecureRandomAccessor.class)
+    private static SecureRandom secureRandom;
+
+}
+
+class SecureRandomAccessor {
+    private static volatile SecureRandom RANDOM;
+
+    static SecureRandom get() {
+        SecureRandom result = RANDOM;
+        if (result == null) {
+            /* Lazy initialization on first access. */
+            result = initializeOnce();
+        }
+        return result;
+    }
+
+    private static synchronized SecureRandom initializeOnce() {
+        SecureRandom result = RANDOM;
+        if (result != null) {
+            /* Double-checked locking is OK because INSTANCE is volatile. */
+            return result;
+        }
+
+        result = new SecureRandom();
+        RANDOM = result;
+        return result;
+    }
+}
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