diff --git a/include/tree_sitter/runtime.h b/include/tree_sitter/runtime.h
index 00b02473..67141fb3 100644
--- a/include/tree_sitter/runtime.h
+++ b/include/tree_sitter/runtime.h
@@ -79,7 +79,7 @@ void ts_document_invalidate(TSDocument *);
 TSNode ts_document_root_node(const TSDocument *);
 size_t ts_document_parse_count(const TSDocument *);
 
-const char *ts_language_symbol_name(TSDocument *, TSSymbol);
+const char *ts_language_symbol_name(TSLanguage *, TSSymbol);
 
 #define ts_builtin_sym_error 0
 #define ts_builtin_sym_end 1