diff --git a/lib/ntlm/heimntlm.h b/lib/ntlm/heimntlm.h
index baa40bdb8..74f6357ea 100644
--- a/lib/ntlm/heimntlm.h
+++ b/lib/ntlm/heimntlm.h
@@ -49,6 +49,8 @@ struct ntlm_buf {
 #define NTLM_SUPPLIED_DOMAIN		0x00001000
 #define NTLM_SUPPLIED_WORKSTAION	0x00002000
 
+#define NTLM_NEG_ALWAYS_SIGN		0x00008000
+
 #define NTLM_NEG_TARGET_DOMAIN		0x00010000
 #define NTLM_ENC_128			0x20000000