diff --git a/src/cube.h b/src/cube.h
index 465f9ce..6c7d618 100644
--- a/src/cube.h
+++ b/src/cube.h
@@ -2,9 +2,7 @@
 
 #import <ObjFW/ObjFW.h>
 
-#define gamma gamma__
 #include <SDL2/SDL.h>
-#undef gamma
 
 #include "tools.h"
 
diff --git a/src/rendergl.m b/src/rendergl.m
index 4168914..1e65b73 100644
--- a/src/rendergl.m
+++ b/src/rendergl.m
@@ -1,5 +1,7 @@
 // rendergl.cpp: core opengl rendering stuff
 
+#define gamma math_gamma
+
 #include "cube.h"
 
 #import "Command.h"
@@ -324,6 +326,8 @@ addstrip(int tex, int start, int n)
 	[strips addItem:&s];
 }
 
+#undef gamma
+
 VARFP(gamma, 30, 100, 300, {
 	float f = gamma / 100.0f;
 	Uint16 ramp[256];
diff --git a/src/tools.h b/src/tools.h
index a11849f..37e2a54 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -3,16 +3,8 @@
 #ifndef _TOOLS_H
 #define _TOOLS_H
 
-#ifdef __GNUC__
-# define gamma __gamma
-#endif
-
 #include <math.h>
 
-#ifdef __GNUC__
-# undef gamma
-#endif
-
 #include <assert.h>
 #include <limits.h>
 #include <stdarg.h>