diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 6a7621b2b12b0061c9edc3daf3a8dbede1a1451c..f5fdca1d67e6fbab0fc5ff7785b8fec0547be76b 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -36,6 +36,7 @@
 #include <linux/nodemask.h>
 
 struct vm_area_struct;
+struct mm_struct;
 
 #ifdef CONFIG_NUMA