diff --git a/Source/palette.cpp b/Source/palette.cpp
index 2df59f173..1abc69523 100644
--- a/Source/palette.cpp
+++ b/Source/palette.cpp
@@ -126,6 +126,7 @@ void ApplyGamma(PALETTEENTRY *dst, const PALETTEENTRY *src, int n)
 		dst++;
 		src++;
 	}
+	force_redraw = 255;
 }
 
 void DecreaseGamma()