diff --git a/hw/xfree86/fbdevhw/fbdevhw.c b/hw/xfree86/fbdevhw/fbdevhw.c
index bff0571ad..6a8aafea7 100644
--- a/hw/xfree86/fbdevhw/fbdevhw.c
+++ b/hw/xfree86/fbdevhw/fbdevhw.c
@@ -14,7 +14,12 @@
 #include "fbdevhw.h"
 #include "fbpriv.h"
 
-#include "asm/page.h"	/* #define for PAGE_* */
+#if 0
+/* kernel header doesn't work with -ansi */
+# include "asm/page.h"	/* #define for PAGE_* */
+#else
+# define PAGE_MASK               (~(getpagesize() - 1))
+#endif
 
 #include "globals.h"
 #define DPMS_SERVER
@@ -22,6 +27,8 @@
 
 #define DEBUG 0
 
+#define PAGE_MASK               (~(getpagesize() - 1))
+
 #if DEBUG
 # define TRACE_ENTER(str)	ErrorF("fbdevHW: " str " %d\n",pScrn->scrnIndex)
 #else