diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c
index a1a0c2adeb6..e60360338d5 100644
--- a/src/backend/utils/time/snapmgr.c
+++ b/src/backend/utils/time/snapmgr.c
@@ -80,7 +80,7 @@
  */
 static SnapshotData CurrentSnapshotData = {SNAPSHOT_MVCC};
 static SnapshotData SecondarySnapshotData = {SNAPSHOT_MVCC};
-SnapshotData CatalogSnapshotData = {SNAPSHOT_MVCC};
+static SnapshotData CatalogSnapshotData = {SNAPSHOT_MVCC};
 SnapshotData SnapshotSelfData = {SNAPSHOT_SELF};
 SnapshotData SnapshotAnyData = {SNAPSHOT_ANY};
 SnapshotData SnapshotToastData = {SNAPSHOT_TOAST};
diff --git a/src/include/utils/snapmgr.h b/src/include/utils/snapmgr.h
index afc284e9c36..52dcddf3a8e 100644
--- a/src/include/utils/snapmgr.h
+++ b/src/include/utils/snapmgr.h
@@ -28,7 +28,6 @@ extern PGDLLIMPORT TransactionId RecentXmin;
 extern PGDLLIMPORT SnapshotData SnapshotSelfData;
 extern PGDLLIMPORT SnapshotData SnapshotAnyData;
 extern PGDLLIMPORT SnapshotData SnapshotToastData;
-extern PGDLLIMPORT SnapshotData CatalogSnapshotData;
 
 #define SnapshotSelf		(&SnapshotSelfData)
 #define SnapshotAny			(&SnapshotAnyData)