diff --git a/lib/ssl/sslinfo.c b/lib/ssl/sslinfo.c
--- a/lib/ssl/sslinfo.c
+++ b/lib/ssl/sslinfo.c
@@ -62,17 +62,17 @@ SSL_GetChannelInfo(PRFileDesc *fd, SSLCh
 	    ssl_ReleaseSpecReadLock(ss);
 	    inf.compressionMethodName =
 		ssl_GetCompressionMethodName(inf.compressionMethod);
 	}
 	if (sid) {
 	    inf.creationTime   = sid->creationTime;
 	    inf.lastAccessTime = sid->lastAccessTime;
 	    inf.expirationTime = sid->expirationTime;
-            inf.extendedMasterSecretUsed = sid->u.ssl3.keys.extendedMasterSecretUsed;
+            inf.reservedNotSupported = PR_FALSE;
 
 	    if (ss->version < SSL_LIBRARY_VERSION_3_0) { /* SSL2 */
 	        inf.sessionIDLength = SSL2_SESSIONID_BYTES;
 		memcpy(inf.sessionID, sid->u.ssl2.sessionID, 
 		       SSL2_SESSIONID_BYTES);
 	    } else {
 		unsigned int sidLen = sid->u.ssl3.sessionIDLength;
 	        sidLen = PR_MIN(sidLen, sizeof inf.sessionID);
diff --git a/lib/ssl/sslt.h b/lib/ssl/sslt.h
--- a/lib/ssl/sslt.h
+++ b/lib/ssl/sslt.h
@@ -145,17 +145,17 @@ typedef struct SSLChannelInfoStr {
     /* compression method info */
     const char *         compressionMethodName;
     SSLCompressionMethod compressionMethod;
 
     /* The following fields are added in NSS 3.21.
      * This field only has meaning in TLS < 1.3 and will be set to
      *  PR_FALSE in TLS 1.3.
      */
-    PRBool               extendedMasterSecretUsed;
+    PRBool               reservedNotSupported; /* don't use */
 } SSLChannelInfo;
 
 /* Preliminary channel info */
 #define ssl_preinfo_version (1U << 0)
 #define ssl_preinfo_cipher_suite (1U << 1)
 #define ssl_preinfo_all (ssl_preinfo_version|ssl_preinfo_cipher_suite)
 
 typedef struct SSLPreliminaryChannelInfoStr {