diff --git a/sirc.c b/sirc.c
index cede4d8..a28e145 100644
--- a/sirc.c
+++ b/sirc.c
@@ -607,6 +607,8 @@ static void handle_irc_line(int si, const char *raw) {
         return;
     }
 
+    if (strcmp(m.cmd,"PONG")==0) return;  /* ignore server's PONG replies */
+
     /* SASL / CAP negotiation */
     if (strcmp(m.cmd,"CAP")==0) {
         char sub[16]="";