diff --git a/tccgen.c b/tccgen.c
index bdaaf129..7bae6aee 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -4662,6 +4662,8 @@ static int parse_btype(CType *type, AttributeDef *ad, int ignore_label)
 	    if (type1.ref)
                 sym_to_attr(ad, type1.ref);
             goto basic_type2;
+        case TOK_THREAD_LOCAL:
+            tcc_error("_Thread_local is not implemented");
         default:
             if (typespec_found)
                 goto the_end;
diff --git a/tcctok.h b/tcctok.h
index 563984a3..9936d2ef 100644
--- a/tcctok.h
+++ b/tcctok.h
@@ -38,6 +38,7 @@
      DEF(TOK_RESTRICT2, "__restrict")
      DEF(TOK_RESTRICT3, "__restrict__")
      DEF(TOK_EXTENSION, "__extension__") /* gcc keyword */
+     DEF(TOK_THREAD_LOCAL, "_Thread_local") /* C11 thread-local storage */
 
      DEF(TOK_GENERIC, "_Generic")
      DEF(TOK_STATIC_ASSERT, "_Static_assert")