diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 3862f05fb0..ebbb5b730c 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -3602,7 +3602,7 @@ getConversions(Archive *fout, int *numConversions)
 	PGresult   *res;
 	int			ntups;
 	int			i;
-	PQExpBuffer query = createPQExpBuffer();
+	PQExpBuffer query;
 	ConvInfo   *convinfo;
 	int			i_tableoid;
 	int			i_oid;
@@ -3617,6 +3617,8 @@ getConversions(Archive *fout, int *numConversions)
 		return NULL;
 	}
 
+	query = createPQExpBuffer();
+
 	/*
 	 * find all conversions, including builtin conversions; we filter out
 	 * system-defined conversions at dump-out time.