--- a/video/cocoa_v.m	Sat Feb 18 17:27:06 2006 +0000
+++ b/video/cocoa_v.m	Sat Feb 18 18:27:17 2006 +0000
@@ -1220,7 +1220,7 @@
  * Fade the display from normal to black
  * Save gamma tables for fade back to normal
  */
-static uint32 QZ_FadeGammaOut(const OTTD_QuartzGammaTable* table)
+static uint32 QZ_FadeGammaOut(OTTD_QuartzGammaTable* table)
 {
 	CGGammaValue redTable[QZ_GAMMA_TABLE_SIZE];
 	CGGammaValue greenTable[QZ_GAMMA_TABLE_SIZE];