diff --git a/xwords4/linux/relaycon.c b/xwords4/linux/relaycon.c
index 8a8a49fb3..a15232e09 100644
--- a/xwords4/linux/relaycon.c
+++ b/xwords4/linux/relaycon.c
@@ -222,7 +222,7 @@ relaycon_receive( GIOChannel* source, GIOCondition condition, gpointer data )
                                   ((0 <= nRead)? nRead : 0) );
     XP_LOGF( "%s: read %zd bytes ('%s')", __func__, nRead, b64 );
     g_free( b64 );
-#ifdef LOG_PACKET_MD5SUMS
+#ifdef COMMS_CHECKSUM
     gchar* sum = g_compute_checksum_for_data( G_CHECKSUM_MD5, buf, nRead );
     XP_LOGF( "%s: read %zd bytes ('%s')(sum=%s)", __func__, nRead, b64, sum );
     g_free( sum );
@@ -349,7 +349,7 @@ sendIt( RelayConStorage* storage, const XP_U8* msgbuf, XP_U16 len )
     ssize_t nSent = sendto( storage->socket, msgbuf, len, 0, /* flags */
                             (struct sockaddr*)&storage->saddr, 
                             sizeof(storage->saddr) );
-#ifdef LOG_PACKET_MD5SUMS
+#ifdef COMMS_CHECKSUM
     gchar* sum = g_compute_checksum_for_data( G_CHECKSUM_MD5, msgbuf, len );
     XP_LOGF( "%s: sent %d bytes with sum %s", __func__, len, sum );
     g_free( sum );