diff --git a/extmod/moductypes.c b/extmod/moductypes.c
index c3da083cf6..f7d3b6a5f5 100644
--- a/extmod/moductypes.c
+++ b/extmod/moductypes.c
@@ -92,7 +92,7 @@ enum {
 #define AGG_TYPE_BITS 2
 
 enum {
-    STRUCT, PTR, ARRAY, BITFIELD,
+    STRUCT, PTR, ARRAY,
 };
 
 // Here we need to set sign bit right