diff --git a/bitops.h b/bitops.h
index 323c5711..5b35f9fc 100644
--- a/bitops.h
+++ b/bitops.h
@@ -3,6 +3,10 @@
 
 #include <linux/kernel.h>
 
+#ifndef DIV_ROUND_UP
+#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#endif
+
 #define BITS_PER_BYTE           8
 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
 #define BITS_TO_U64(nr)         DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))