diff --git a/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/parse.y b/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/parse.y
index 2e36cbb70861..d0e9386a68f9 100644
--- a/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/parse.y
+++ b/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/parse.y
@@ -5028,7 +5028,7 @@ parse_string(parser_state *p)
     int f = 0;
     int re_opt;
     char *s = strndup(tok(p), toklen(p));
-    char flags[3];
+    char flags[4];
     char *flag = flags;
     char enc = '\0';
     char *encp;
@@ -5068,6 +5068,7 @@ parse_string(parser_state *p)
       if (f & 4) *flag++ = 'm';
       if (f & 16) enc = 'u';
       if (f & 32) enc = 'n';
+      if (f & 128) *flag++ = 'l';
     }
     if (flag > flags) {
       dup = strndup(flags, (size_t)(flag - flags));
diff --git a/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/y.tab.c b/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/y.tab.c
index 00853c54da74..beb10edeb1c0 100644
--- a/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/y.tab.c
+++ b/artichoke-backend/vendor/mruby/mrbgems/mruby-compiler/core/y.tab.c
@@ -11635,7 +11635,7 @@ parse_string(parser_state *p)
     int f = 0;
     int re_opt;
     char *s = strndup(tok(p), toklen(p));
-    char flags[3];
+    char flags[4];
     char *flag = flags;
     char enc = '\0';
     char *encp;
@@ -11675,6 +11675,7 @@ parse_string(parser_state *p)
       if (f & 4) *flag++ = 'm';
       if (f & 16) enc = 'u';
       if (f & 32) enc = 'n';
+      if (f & 128) *flag++ = 'l';
     }
     if (flag > flags) {
       dup = strndup(flags, (size_t)(flag - flags));