diff --git a/src/util.h b/src/util.h
index 66c70294ee..0134736a8e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -1098,8 +1098,10 @@ class COSUtil
     {
 #ifdef _WIN32
         return OT_WINDOWS;
-#elif defined( __APPLE__ ) || defined( __MACOSX )
+#elif defined( Q_OS_MACOS )
         return OT_MAC_OS;
+#elif defined( Q_OS_IOS )
+        return OT_I_OS;
 #elif defined( ANDROID )
         return OT_ANDROID;
 #else