diff --git a/v2/internal/frontend/desktop/darwin/Application.m b/v2/internal/frontend/desktop/darwin/Application.m
index f296382ac..b2629f305 100644
--- a/v2/internal/frontend/desktop/darwin/Application.m
+++ b/v2/internal/frontend/desktop/darwin/Application.m
@@ -39,8 +39,9 @@ void ProcessURLResponse(void *inctx, const char *url, const char *contentType, c
 
 void ExecJS(void* inctx, const char *script) {
     WailsContext *ctx = (__bridge WailsContext*) inctx;
+    NSString *nsscript = [NSString stringWithUTF8String:script];
     ON_MAIN_THREAD(
-       [ctx ExecJS:script];
+       [ctx ExecJS:nsscript];
     );
 }
 
diff --git a/v2/internal/frontend/desktop/darwin/WailsContext.h b/v2/internal/frontend/desktop/darwin/WailsContext.h
index d67b4a466..e26d9d089 100644
--- a/v2/internal/frontend/desktop/darwin/WailsContext.h
+++ b/v2/internal/frontend/desktop/darwin/WailsContext.h
@@ -75,7 +75,7 @@
 
 - (void) loadRequest:(NSString*)url;
 - (void) processURLResponse:(NSString *)url :(NSString *)contentType :(NSData*)data;
-- (void) ExecJS:(const char*)script;
+- (void) ExecJS:(NSString*)script;
 - (NSScreen*) getCurrentScreen;
 
 - (void) SetAbout :(const char*)title :(const char*)description :(void*)imagedata :(int)datalen;
diff --git a/v2/internal/frontend/desktop/darwin/WailsContext.m b/v2/internal/frontend/desktop/darwin/WailsContext.m
index bc0ebc95e..7d117b643 100644
--- a/v2/internal/frontend/desktop/darwin/WailsContext.m
+++ b/v2/internal/frontend/desktop/darwin/WailsContext.m
@@ -362,9 +362,10 @@
     }
 }
 
-- (void) ExecJS:(const char*)script {
-    NSString *nsscript = [NSString stringWithUTF8String:script];
-    [self.webview evaluateJavaScript:nsscript completionHandler:nil];
+- (void) ExecJS:(NSString*)script {
+    ON_MAIN_THREAD(
+                   [self.webview evaluateJavaScript:script completionHandler:nil];
+    )
 }
 
 - (void) processURLResponse:(NSString *)url :(NSString *)contentType :(NSData *)data {