diff --git a/lib/gssapi/NTMakefile b/lib/gssapi/NTMakefile
index dcebb9176..81c22b184 100644
--- a/lib/gssapi/NTMakefile
+++ b/lib/gssapi/NTMakefile
@@ -33,6 +33,8 @@
 
 RELDIR=lib\gssapi 
 
+intcflags=-DASN1_LIB
+
 !include ../../windows/NTMakefile.w32 
 
 krb5src = \