diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h
index 51e6e2a54e6f..3aa4c3833c77 100644
--- a/sys/amd64/include/cpufunc.h
+++ b/sys/amd64/include/cpufunc.h
@@ -119,6 +119,8 @@ enable_intr(void)
 	__asm __volatile("sti");
 }
 
+#ifdef _KERNEL
+
 #define	HAVE_INLINE_FFS
 
 static __inline int
@@ -162,6 +164,8 @@ flsl(long mask)
 	return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);
 }
 
+#endif /* _KERNEL */
+
 static __inline void
 halt(void)
 {
diff --git a/sys/i386/include/cpufunc.h b/sys/i386/include/cpufunc.h
index cdea6d84126e..6d00fff30409 100644
--- a/sys/i386/include/cpufunc.h
+++ b/sys/i386/include/cpufunc.h
@@ -98,6 +98,8 @@ enable_intr(void)
 	__asm __volatile("sti");
 }
 
+#ifdef _KERNEL
+
 #define	HAVE_INLINE_FFS
 
 static __inline int
@@ -120,6 +122,8 @@ fls(int mask)
 	return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
 }
 
+#endif /* _KERNEL */
+
 static __inline void
 halt(void)
 {