diff --git a/examples/libevent-client.c b/examples/libevent-client.c
index a1994494..598c67e7 100644
--- a/examples/libevent-client.c
+++ b/examples/libevent-client.c
@@ -425,7 +425,11 @@ static void readcb(struct bufferevent *bev, void *ptr)
     delete_http2_session_data(session_data);
     return;
   }
-  evbuffer_drain(input, readlen);
+  if(evbuffer_drain(input, readlen) != 0) {
+    warnx("Fatal error: evbuffer_drain failed");
+    delete_http2_session_data(session_data);
+    return;
+  }
   if(session_send(session_data) != 0) {
     delete_http2_session_data(session_data);
     return;
diff --git a/examples/libevent-server.c b/examples/libevent-server.c
index fce3c409..e5a416c9 100644
--- a/examples/libevent-server.c
+++ b/examples/libevent-server.c
@@ -250,7 +250,10 @@ static int session_recv(http2_session_data *session_data)
     warnx("Fatal error: %s", nghttp2_strerror((int)readlen));
     return -1;
   }
-  evbuffer_drain(input, readlen);
+  if(evbuffer_drain(input, readlen) != 0) {
+    warnx("Fatal error: evbuffer_drain failed");
+    return -1;
+  }
   if(session_send(session_data) != 0) {
     return -1;
   }