diff --git a/src/bin/pg_rewind/libpq_fetch.c b/src/bin/pg_rewind/libpq_fetch.c
index 23c971a..e696554 100644
--- a/src/bin/pg_rewind/libpq_fetch.c
+++ b/src/bin/pg_rewind/libpq_fetch.c
@@ -231,6 +231,7 @@ receiveFileChunks(const char *sql)
 				break;
 
 			case PGRES_TUPLES_OK:
+				PQclear(res);
 				continue;		/* final zero-row result */
 
 			default: