diff --git a/security/nss/lib/smime/cms.h b/security/nss/lib/smime/cms.h
index 6dd5c3c6c47..812718415e7 100644
--- a/security/nss/lib/smime/cms.h
+++ b/security/nss/lib/smime/cms.h
@@ -34,7 +34,7 @@
 /*
  * Interfaces of the CMS implementation.
  *
- * $Id: cms.h,v 1.13 2002-09-20 04:41:45 jpierre%netscape.com Exp $
+ * $Id: cms.h,v 1.14 2002-10-30 01:31:01 wtc%netscape.com Exp $
  */
 
 #ifndef _CMS_H_
@@ -131,6 +131,12 @@ NSS_CMSEncoder_Start(NSSCMSMessage *cmsg,
 extern SECStatus
 NSS_CMSEncoder_Update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len);
 
+/*
+ * NSS_CMSEncoder_Cancel - stop all encoding
+ */
+extern SECStatus
+NSS_CMSEncoder_Cancel(NSSCMSEncoderContext *p7ecx);
+
 /*
  * NSS_CMSEncoder_Finish - signal the end of data
  *