diff --git a/src/backend/access/transam/parallel.c b/src/backend/access/transam/parallel.c
index 0b94c0f87e9..e09bdb20b0d 100644
--- a/src/backend/access/transam/parallel.c
+++ b/src/backend/access/transam/parallel.c
@@ -28,6 +28,7 @@
 #include "tcop/tcopprot.h"
 #include "utils/combocid.h"
 #include "utils/guc.h"
+#include "utils/inval.h"
 #include "utils/memutils.h"
 #include "utils/resowner.h"
 #include "utils/snapmgr.h"
@@ -928,6 +929,12 @@ ParallelWorkerMain(Datum main_arg)
 	Assert(asnapspace != NULL);
 	PushActiveSnapshot(RestoreSnapshot(asnapspace));
 
+	/*
+	 * We've changed which tuples we can see, and must therefore invalidate
+	 * system caches.
+	 */
+	InvalidateSystemCaches();
+
 	/* Restore user ID and security context. */
 	SetUserIdAndSecContext(fps->current_user_id, fps->sec_context);