diff --git a/include/asm-s390/bitops.h b/include/asm-s390/bitops.h
index 8651524217fd..b07c578b22ea 100644
--- a/include/asm-s390/bitops.h
+++ b/include/asm-s390/bitops.h
@@ -518,8 +518,8 @@ static inline int __test_bit(unsigned long nr, const volatile unsigned long *ptr
 
 static inline int 
 __constant_test_bit(unsigned long nr, const volatile unsigned long *addr) {
-    return (((volatile char *) addr)
-	    [(nr^(__BITOPS_WORDSIZE-8))>>3] & (1<<(nr&7)));
+    return ((((volatile char *) addr)
+	    [(nr^(__BITOPS_WORDSIZE-8))>>3] & (1<<(nr&7)))) != 0;
 }
 
 #define test_bit(nr,addr) \