diff --git a/GoogleSignIn/Sources/GIDEMMSupport.m b/GoogleSignIn/Sources/GIDEMMSupport.m
index 0914d841..e812c0e3 100644
--- a/GoogleSignIn/Sources/GIDEMMSupport.m
+++ b/GoogleSignIn/Sources/GIDEMMSupport.m
@@ -95,7 +95,7 @@ + (void)handleTokenFetchEMMError:(nullable NSError *)error
                                                        emmSupport:(nullable NSString *)emmSupport
                                            isPasscodeInfoRequired:(BOOL)isPasscodeInfoRequired {
   if (!emmSupport) {
-    return parameters;
+    return [GIDEMMSupport dictionaryWithStringValuesFromDictionary:parameters];
   }
   NSMutableDictionary *allParameters = [(parameters ?: @{}) mutableCopy];
   allParameters[kEMMSupportParameterName] = emmSupport;