diff --git a/intern/ghost/intern/GHOST_WindowCocoa.mm b/intern/ghost/intern/GHOST_WindowCocoa.mm
index 8d5f8bf89d5..6517e3fb9f9 100644
--- a/intern/ghost/intern/GHOST_WindowCocoa.mm
+++ b/intern/ghost/intern/GHOST_WindowCocoa.mm
@@ -514,6 +514,8 @@ GHOST_WindowCocoa::GHOST_WindowCocoa(
 	pixelFormatAttrsWindow[i++] = NSOpenGLPFADepthSize;
 	pixelFormatAttrsWindow[i++] = (NSOpenGLPixelFormatAttribute) 32;
 	
+	pixelFormatAttrsWindow[i++] = NSOpenGLPFAAccumSize;
+	pixelFormatAttrsWindow[i++] = (NSOpenGLPixelFormatAttribute) 32;
 	
 	if (stereoVisual) pixelFormatAttrsWindow[i++] = NSOpenGLPFAStereo;
 	
@@ -556,6 +558,9 @@ GHOST_WindowCocoa::GHOST_WindowCocoa(
 		
 		pixelFormatAttrsWindow[i++] = NSOpenGLPFADepthSize;
 		pixelFormatAttrsWindow[i++] = (NSOpenGLPixelFormatAttribute) 32;
+
+		pixelFormatAttrsWindow[i++] = NSOpenGLPFAAccumSize;
+		pixelFormatAttrsWindow[i++] = (NSOpenGLPixelFormatAttribute) 32;
 		
 		if (stereoVisual) pixelFormatAttrsWindow[i++] = NSOpenGLPFAStereo;