diff --git a/hw/xfree86/common/xf86cmap.c b/hw/xfree86/common/xf86cmap.c
index bb639c4f8..ca547cc33 100644
--- a/hw/xfree86/common/xf86cmap.c
+++ b/hw/xfree86/common/xf86cmap.c
@@ -29,18 +29,12 @@
 #include <xorg-config.h>
 #endif
 
-#if defined(_XOPEN_SOURCE) || defined(__sun) && defined(__SVR4)
 #include <math.h>
-#else
-#define _XOPEN_SOURCE           /* to get prototype for pow on some systems */
-#include <math.h>
-#undef _XOPEN_SOURCE
-#endif
-
 #include <X11/X.h>
-#include "misc.h"
 #include <X11/Xproto.h>
 
+#include "misc.h"
+
 #include "dix/colormap_priv.h"
 #include "colormapst.h"
 #include "scrnintstr.h"