diff --git a/src/backend/Makefile b/src/backend/Makefile
index f29d28d4916..bbc59f76c73 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -309,6 +309,7 @@ maintainer-clean: distclean
 	      catalog/postgres.description \
 	      catalog/postgres.shdescription \
 	      replication/repl_gram.c \
+	      replication/repl_gram.h \
 	      replication/repl_scanner.c \
 	      utils/fmgroids.h \
 	      utils/fmgrtab.c \