diff --git a/core/runtime/src/main/java/io/quarkus/runtime/ResourceHelper.java b/core/runtime/src/main/java/io/quarkus/runtime/ResourceHelper.java
index 3d37825a5450a..0d7f214e37a59 100644
--- a/core/runtime/src/main/java/io/quarkus/runtime/ResourceHelper.java
+++ b/core/runtime/src/main/java/io/quarkus/runtime/ResourceHelper.java
@@ -13,6 +13,7 @@
 public class ResourceHelper {
 
     public static void registerResources(String resource) {
+        resource = resource.replace('\\', '/')); // correct Windows paths
         Version currentGraalVmVersion = Version.getCurrent();
         if (currentGraalVmVersion.compareTo(22, 3) >= 0) {
             // Use the public API RuntimeResourceAccess with GraalVM >= 22.3