diff --git a/Server/src/main/java/org/gluu/oxauth/introspection/ws/rs/IntrospectionWebService.java b/Server/src/main/java/org/gluu/oxauth/introspection/ws/rs/IntrospectionWebService.java
index 4332ea423..87f99b98f 100644
--- a/Server/src/main/java/org/gluu/oxauth/introspection/ws/rs/IntrospectionWebService.java
+++ b/Server/src/main/java/org/gluu/oxauth/introspection/ws/rs/IntrospectionWebService.java
@@ -113,9 +113,9 @@ private AuthorizationGrant validateAuthorization(String p_authorization, String
         if (authorizationGrant == null) {
             log.debug("Authorization grant is null.");
             if (isTrue(pair.getSecond())) {
-                log.debug("Returned {\"active\":false.");
+                log.debug("Returned {\"active\":false}.");
                 throw new WebApplicationException(Response.status(Response.Status.OK)
-                        .entity("{\"active\":false")
+                        .entity("{\"active\":false}")
                         .type(MediaType.APPLICATION_JSON_TYPE)
                         .build());
             }