diff --git a/adapters/oidc/js/src/main/resources/keycloak.js b/adapters/oidc/js/src/main/resources/keycloak.js
index 2dc28f2531..91abc5127e 100755
--- a/adapters/oidc/js/src/main/resources/keycloak.js
+++ b/adapters/oidc/js/src/main/resources/keycloak.js
@@ -431,6 +431,9 @@
 
             var expiresIn = kc.tokenParsed['exp'] - Math.ceil(new Date().getTime() / 1000) + kc.timeSkew;
             if (minValidity) {
+                if (isNaN(minValidity)) {
+                    throw 'Invalid minValidity';
+                }
                 expiresIn -= minValidity;
             }
             return expiresIn < 0;