diff --git a/src/mesa/program/program_parse.y b/src/mesa/program/program_parse.y
index 862ca88cf72..ed552fc1827 100644
--- a/src/mesa/program/program_parse.y
+++ b/src/mesa/program/program_parse.y
@@ -2068,6 +2068,7 @@ ALIAS_statement: ALIAS IDENTIFIER '=' USED_IDENTIFIER
          YYERROR;
       } else {
          _mesa_symbol_table_add_symbol(state->st, $2, target);
+         free($2);
       }
       (void)yynerrs;
    }