diff --git a/include/asm-x86_64/desc.h b/include/asm-x86_64/desc.h
index 594e610f4a1e..68ac3c62fe3d 100644
--- a/include/asm-x86_64/desc.h
+++ b/include/asm-x86_64/desc.h
@@ -8,6 +8,8 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
+#include <linux/smp.h>
+
 #include <asm/segment.h>
 #include <asm/mmu.h>