diff --git a/src/bin/pg_amcheck/pg_amcheck.c b/src/bin/pg_amcheck/pg_amcheck.c
index 6a83fae6174..9acb6fe8833 100644
--- a/src/bin/pg_amcheck/pg_amcheck.c
+++ b/src/bin/pg_amcheck/pg_amcheck.c
@@ -552,7 +552,7 @@ main(int argc, char *argv[])
 
 			executeCommand(conn, install_sql, opts.echo);
 			pfree(install_sql);
-			pfree(schema);
+			PQfreemem(schema);
 		}
 
 		/*