diff --git a/src/parse-gram.c b/src/parse-gram.c
index 8ff1d067..2cf9e86c 100644
--- a/src/parse-gram.c
+++ b/src/parse-gram.c
@@ -2676,7 +2676,7 @@ yyreduce:
 #line 683 "src/parse-gram.y" /* yacc.c:1668  */
     {
       code_props plain_code;
-      (yyvsp[0].code)[strlen ((yyvsp[0].code)) - 1] = '\n';
+      (yyvsp[0].code)[strlen ((yyvsp[0].code)) - 1] = '\0';
       code_props_plain_init (&plain_code, (yyvsp[0].code)+1, (yylsp[0]));
       code_props_translate_code (&plain_code);
       gram_scanner_last_string_free ();
diff --git a/src/parse-gram.y b/src/parse-gram.y
index b6338597..ebcd31b3 100644
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -682,7 +682,7 @@ braceless:
   "{...}"
     {
       code_props plain_code;
-      $1[strlen ($1) - 1] = '\n';
+      $1[strlen ($1) - 1] = '\0';
       code_props_plain_init (&plain_code, $1+1, @1);
       code_props_translate_code (&plain_code);
       gram_scanner_last_string_free ();