diff --git a/src/Summary.cpp b/src/Summary.cpp
index 08326458..959ccfad 100644
--- a/src/Summary.cpp
+++ b/src/Summary.cpp
@@ -22,6 +22,7 @@
  */
 
 
+#include <inttypes.h>
 #include <uv.h>
 
 
@@ -94,7 +95,7 @@ static void print_threads()
 {
     char buf[32];
     if (Options::i()->affinity() != -1L) {
-        snprintf(buf, 32, ", affinity=0x%llX", Options::i()->affinity());
+        snprintf(buf, 32, ", affinity=0x%" PRIX64, Options::i()->affinity());
     }
     else {
         buf[0] = '\0';
diff --git a/src/net/Client.cpp b/src/net/Client.cpp
index 953dde4c..62dcdb3d 100644
--- a/src/net/Client.cpp
+++ b/src/net/Client.cpp
@@ -416,8 +416,8 @@ void Client::parseResponse(int64_t id, const json_t *result, const json_t *error
 
 void Client::ping()
 {
-    char *req = static_cast<char*>(malloc(128));
-    snprintf(req, 128, "{\"id\":%" PRId64 ",\"jsonrpc\":\"2.0\",\"method\":\"keepalived\",\"params\":{\"id\":\"%s\"}}\n", m_sequence, m_rpcId);
+    char *req = static_cast<char*>(malloc(160));
+    snprintf(req, 160, "{\"id\":%" PRId64 ",\"jsonrpc\":\"2.0\",\"method\":\"keepalived\",\"params\":{\"id\":\"%s\"}}\n", m_sequence, m_rpcId);
 
     send(req);
 }