diff --git a/Server/src/main/java/org/gluu/oxauth/model/registration/RegisterParamsValidator.java b/Server/src/main/java/org/gluu/oxauth/model/registration/RegisterParamsValidator.java
index 899a6e9d3..428b7e893 100644
--- a/Server/src/main/java/org/gluu/oxauth/model/registration/RegisterParamsValidator.java
+++ b/Server/src/main/java/org/gluu/oxauth/model/registration/RegisterParamsValidator.java
@@ -349,7 +349,7 @@ public boolean validateInitiateLoginUri(String initiateLoginUri) {
     private boolean checkWhiteListRedirectUris(List<String> redirectUris) {
         boolean valid = true;
         List<String> whiteList = appConfiguration.getClientWhiteList();
-        boolean wildcardSupported = appConfiguration.getAllowWildcardRedirectUri();
+        boolean wildcardSupported = isTrue(appConfiguration.getAllowWildcardRedirectUri());
         URLPatternList urlPatternList = new URLPatternList(whiteList, wildcardSupported);
 
         for (String redirectUri : redirectUris) {
@@ -365,7 +365,7 @@ private boolean checkWhiteListRedirectUris(List<String> redirectUris) {
     private boolean checkBlackListRedirectUris(List<String> redirectUris) {
         boolean valid = true;
         List<String> blackList = appConfiguration.getClientBlackList();
-        boolean wildcardSupported = appConfiguration.getAllowWildcardRedirectUri();
+        boolean wildcardSupported = isTrue(appConfiguration.getAllowWildcardRedirectUri());
         URLPatternList urlPatternList = new URLPatternList(blackList, wildcardSupported);
 
         for (String redirectUri : redirectUris) {