diff --git a/blib2to3/pgen2/token.pyi b/blib2to3/pgen2/token.pyi
index c256af8f27f..b51bbcfeff9 100644
--- a/blib2to3/pgen2/token.pyi
+++ b/blib2to3/pgen2/token.pyi
@@ -64,6 +64,7 @@ if sys.version_info >= (3, 5):
     AWAIT: int
     ASYNC: int
 ERRORTOKEN: int
+COLONEQUAL: int
 N_TOKENS: int
 NT_OFFSET: int
 tok_name: Dict[int, Text]