diff --git a/src/backend/port/win32_shmem.c b/src/backend/port/win32_shmem.c
index a537bb3..29ea6d8 100644
--- a/src/backend/port/win32_shmem.c
+++ b/src/backend/port/win32_shmem.c
@@ -15,6 +15,7 @@
 #include "miscadmin.h"
 #include "storage/ipc.h"
 #include "storage/pg_shmem.h"
+#include "storage/dsm.h"
 
 HANDLE		UsedShmemSegID = 0;
 void	   *UsedShmemSegAddr = NULL;