diff --git a/sys/osxvideo/cocoawindow.m b/sys/osxvideo/cocoawindow.m
index 0a256acd47..ed24fadc28 100644
--- a/sys/osxvideo/cocoawindow.m
+++ b/sys/osxvideo/cocoawindow.m
@@ -128,6 +128,7 @@
   }
 
   self = [super initWithFrame: frame pixelFormat:fmt];
+  [fmt release];
 
    actualContext = [self openGLContext];
    [actualContext makeCurrentContext];