diff --git a/lib/halfmd4.c b/lib/halfmd4.c
index a8fe6274a13cfe4265f8f60a7726ba8f1def6edb..137e861d96902241455d8d4ffb01d5b79a4ef2e3 100644
--- a/lib/halfmd4.c
+++ b/lib/halfmd4.c
@@ -1,6 +1,7 @@
 #include <linux/compiler.h>
 #include <linux/export.h>
 #include <linux/cryptohash.h>
+#include <linux/bitops.h>
 
 /* F, G and H are basic MD4 functions: selection, majority, parity */
 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
@@ -14,7 +15,7 @@
  * Rotation is separate from addition to prevent recomputation
  */
 #define ROUND(f, a, b, c, d, x, s)	\
-	(a += f(b, c, d) + x, a = (a << s) | (a >> (32 - s)))
+	(a += f(b, c, d) + x, a = rol32(a, s))
 #define K1 0
 #define K2 013240474631UL
 #define K3 015666365641UL