diff --git a/maxkey-protocols/maxkey-protocol-cas/src/main/java/org/maxkey/authz/cas/endpoint/CasAuthorizeEndpoint.java b/maxkey-protocols/maxkey-protocol-cas/src/main/java/org/maxkey/authz/cas/endpoint/CasAuthorizeEndpoint.java
index 8113edf20..6844b420f 100644
--- a/maxkey-protocols/maxkey-protocol-cas/src/main/java/org/maxkey/authz/cas/endpoint/CasAuthorizeEndpoint.java
+++ b/maxkey-protocols/maxkey-protocol-cas/src/main/java/org/maxkey/authz/cas/endpoint/CasAuthorizeEndpoint.java
@@ -131,7 +131,7 @@ public class CasAuthorizeEndpoint  extends CasBaseAuthorizeEndpoint{
     		parameterMap.remove(CasConstants.PARAMETER.TICKET);
     		parameterMap.remove(CasConstants.PARAMETER.SERVICE);
     		for (String key : parameterMap.keySet()) {
-    		    callbackUrl.append("&").append(key).append(parameterMap.get(key));
+    		    callbackUrl.append("&").append(key).append("=").append(parameterMap.get(key));
     		}
 		}