diff --git a/Bonnie.c b/Bonnie.c
index 909ca4a..b3a782a 100644
--- a/Bonnie.c
+++ b/Bonnie.c
@@ -77,11 +77,6 @@
 #include <sys/wait.h>
 #include <stdlib.h>
 
-#ifdef __linux__
-/* for o_direct */
-#include <asm/page.h>
-#endif
-
 #ifdef unix
 #include <signal.h>
 #endif
@@ -197,13 +192,13 @@ int main(
   int	 volcnt;
   register off_t  words;
 
-  __buf = malloc(Chunk + ~PAGE_MASK);
+  __buf = malloc(Chunk + ~(sysconf(_SC_PAGE_SIZE)-1));
   if (!__buf) 
   {
-    fprintf(stderr, "unable to malloc %d bytes\n", Chunk + ~PAGE_MASK);
+    fprintf(stderr, "unable to malloc %d bytes\n", Chunk + ~(sysconf(_SC_PAGE_SIZE)-1));
     exit(1) ;
   }
-  buf = (int *)((unsigned long)(__buf + ~PAGE_MASK) & PAGE_MASK);
+  buf = (int *)((unsigned long)(__buf + ~(sysconf(_SC_PAGE_SIZE)-1)) & sysconf(_SC_PAGE_SIZE)-1);
 
   basetime = (int) time((time_t *) NULL);
   size = 100;