diff --git a/arch/microblaze/include/asm/string.h b/arch/microblaze/include/asm/string.h
index f7728c90fc18..aec2f59298b8 100644
--- a/arch/microblaze/include/asm/string.h
+++ b/arch/microblaze/include/asm/string.h
@@ -9,7 +9,7 @@
 #ifndef _ASM_MICROBLAZE_STRING_H
 #define _ASM_MICROBLAZE_STRING_H
 
-#ifndef __KERNEL__
+#ifdef __KERNEL__
 
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY