diff --git a/pycdas.cpp b/pycdas.cpp
index 724149dcc..b73410fe9 100644
--- a/pycdas.cpp
+++ b/pycdas.cpp
@@ -17,7 +17,7 @@
 static const char* flag_names[] = {
     "CO_OPTIMIZED", "CO_NEWLOCALS", "CO_VARARGS", "CO_VARKEYWORDS",
     "CO_NESTED", "CO_GENERATOR", "CO_NOFREE", "CO_COROUTINE",
-    "CO_ITERABLE_COROUTINE", "<0x200>", "<0x400>", "<0x800>",
+    "CO_ITERABLE_COROUTINE", "CO_ASYNC_GENERATOR", "<0x400>", "<0x800>",
     "CO_GENERATOR_ALLOWED", "<0x2000>", "<0x4000>", "<0x8000>",
     "<0x10000>", "CO_FUTURE_DIVISION", "CO_FUTURE_ABSOLUTE_IMPORT", "CO_FUTURE_WITH_STATEMENT",
     "CO_FUTURE_PRINT_FUNCTION", "CO_FUTURE_UNICODE_LITERALS", "CO_FUTURE_BARRY_AS_BDFL",