diff --git a/jans-core/service/src/main/java/io/jans/service/UserAuthenticatorService.java b/jans-core/service/src/main/java/io/jans/service/UserAuthenticatorService.java
index ce7a9b4ec86..f95828b2314 100644
--- a/jans-core/service/src/main/java/io/jans/service/UserAuthenticatorService.java
+++ b/jans-core/service/src/main/java/io/jans/service/UserAuthenticatorService.java
@@ -28,7 +28,7 @@ public class UserAuthenticatorService {
 	@Inject
 	private Logger log;
 
-	public static String EXTERNAL_UID_FORMAT = "%s: %s";
+	public static String EXTERNAL_UID_FORMAT = "%s:%s";
 	private static String[] EMPTY_STRING_ARRAY = new String[0];
 	
 	private static final UserAuthenticatorList EMPTY_USER_AUTHENTICATOR_LIST = new UserAuthenticatorList(Collections.emptyList());