diff --git a/quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/configuration/KeycloakPropertiesConfigSource.java b/quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/configuration/KeycloakPropertiesConfigSource.java
index a91feda9a1d7..e09069bf9061 100644
--- a/quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/configuration/KeycloakPropertiesConfigSource.java
+++ b/quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/configuration/KeycloakPropertiesConfigSource.java
@@ -63,7 +63,21 @@ protected String[] getFileExtensions() {
 
     @Override
     protected ConfigSource loadConfigSource(URL url, int ordinal) throws IOException {
-        return new PropertiesConfigSource(transform(ConfigSourceUtil.urlToMap(url)), url.toString(), ordinal);
+        // a workaround for https://github.com/smallrye/smallrye-config/issues/1207
+        // replace by the following line when fixed:
+        // return new PropertiesConfigSource(transform(ConfigSourceUtil.urlToMap(url)), url.toString(), ordinal);
+        var cs = new PropertiesConfigSource(transform(ConfigSourceUtil.urlToMap(url)), url.toString(), ordinal) {
+            private String name;
+            @Override
+            public String getName() {
+                return name;
+            }
+            public void setName(String name) {
+                this.name = name;
+            }
+        };
+        cs.setName(url.toString());
+        return cs;
     }
 
     public static class InClassPath extends KeycloakPropertiesConfigSource implements ConfigSourceProvider {