diff --git a/src/video/quartz/SDL_QuartzWM.m b/src/video/quartz/SDL_QuartzWM.m
index d526424d4..6a0c98695 100644
--- a/src/video/quartz/SDL_QuartzWM.m
+++ b/src/video/quartz/SDL_QuartzWM.m
@@ -55,7 +55,7 @@ void QZ_FreeWMCursor     (_THIS, WMcursor *cursor) {
     
     /* copy data and mask, extending the mask to all black pixels because the inversion effect doesn't work with Cocoa's alpha-blended cursors */
     for (i = 0; i < (w+7)/8*h; i++) {
-        planes[0][i] = data[i] ^ 0xFF;
+        planes[0][i] = ~data[i] & mask[i];
         planes[1][i] = mask[i] | data[i];
     }