diff --git a/src/cocoa/i_backend_cocoa.mm b/src/cocoa/i_backend_cocoa.mm
index d2c8b3093..ff602cb9d 100644
--- a/src/cocoa/i_backend_cocoa.mm
+++ b/src/cocoa/i_backend_cocoa.mm
@@ -1181,7 +1181,7 @@ static ApplicationController* appCtrl;
 	const NSSize viewSize = GetRealContentViewSize(m_window);
 	
 	glViewport(0, 0, viewSize.width, viewSize.height);
-	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 	glClear(GL_COLOR_BUFFER_BIT);
 
 	CGLFlushDrawable(CGLGetCurrentContext());