diff --git a/ui/drivers/ui_cocoa.m b/ui/drivers/ui_cocoa.m
index 28f96395b4..2fe82bbc59 100644
--- a/ui/drivers/ui_cocoa.m
+++ b/ui/drivers/ui_cocoa.m
@@ -609,7 +609,7 @@ int main(int argc, char *argv[])
 {
    if (argc == 2)
    {
-       if (argv[1] != '\0')
+       if (argv[1] != NULL)
            if (!strncmp(argv[1], "-psn", 4))
                argc = 1;
    }