diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index 51283db53667..87c2cd66a9ce 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -510,7 +510,7 @@ static inline int fls(unsigned int x)
 	return 32 - cnt;
 }
 
-static inline int __fls(int x)
+static inline unsigned long __fls(unsigned long x)
 {
 	return fls(x) - 1;
 }