diff --git a/quarkus/deployment/src/main/java/org/keycloak/quarkus/deployment/KeycloakProcessor.java b/quarkus/deployment/src/main/java/org/keycloak/quarkus/deployment/KeycloakProcessor.java
index 4a800a3883d..5848c7ddc07 100644
--- a/quarkus/deployment/src/main/java/org/keycloak/quarkus/deployment/KeycloakProcessor.java
+++ b/quarkus/deployment/src/main/java/org/keycloak/quarkus/deployment/KeycloakProcessor.java
@@ -20,6 +20,8 @@ package org.keycloak.quarkus.deployment;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Path;
@@ -1041,9 +1043,13 @@ class KeycloakProcessor {
                 // descriptor is at META-INF/
                 Path basePath = Path.of(url.getPath()).getParent().getParent();
 
+                String path = basePath.resolve(fileName).toString();
+                if (!path.startsWith(url.getProtocol())) {
+                    path = url.getProtocol() + ":" + path;
+                }
                 try {
-                    return basePath.resolve(fileName).toUri().toURL().openStream();
-                } catch (IOException e) {
+                    return new URI(path).toURL().openStream();
+                } catch (IOException | URISyntaxException e) {
                     throw new RuntimeException("Failed to read script file from: " + fileName);
                 }
             });