diff --git a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusDev.java b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusDev.java
index e248cfc79febd..9a3ebcf051b5b 100644
--- a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusDev.java
+++ b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusDev.java
@@ -571,7 +571,7 @@ private void addLocalProject(ResolvedDependency project, GradleDevModeLauncher.B
             }
         }
         Path classesDir = classesDirs.isEmpty() ? null
-                : QuarkusGradleUtils.mergeClassesDirs(classesDirs, project.getWorkspaceModule().getBuildDir(), root, root);
+                : QuarkusGradleUtils.mergeClassesDirs(classesDirs, project.getWorkspaceModule().getBuildDir(), root, false);
 
         final Set<Path> resourcesSrcDirs = new LinkedHashSet<>();
         // resourcesSrcDir may exist but if it's empty the resources output dir won't be created