diff --git a/lib/asn1/symbol.h b/lib/asn1/symbol.h
index 770a64203..3ba6a710e 100644
--- a/lib/asn1/symbol.h
+++ b/lib/asn1/symbol.h
@@ -39,7 +39,6 @@
 enum typetype { 
     TApplication,
     TBitString,
-    TBoolean,
     TChoice,
     TEnumerated,
     TGeneralString,