diff --git a/src/ChatManager.cpp b/src/ChatManager.cpp
index 548de0f..2f011fa 100644
--- a/src/ChatManager.cpp
+++ b/src/ChatManager.cpp
@@ -11,6 +11,7 @@
 
 #include <sstream>
 #include <iterator>
+#include <math.h>
 
 std::map<std::string, ChatCommand> ChatManager::commands;
 
diff --git a/src/ChatManager.hpp b/src/ChatManager.hpp
index 6a84792..b8d06ee 100644
--- a/src/ChatManager.hpp
+++ b/src/ChatManager.hpp
@@ -3,7 +3,6 @@
 #include "CNShardServer.hpp"
 
 #define CMD_PREFIX '/'
-#define M_PI 3.14159265358979323846
 
 typedef void (*CommandHandler)(std::string fullString, std::vector<std::string>& args, CNSocket* sock);