diff --git a/CGL/src/path.cpp b/CGL/src/path.cpp
index 06919c3..1cd541d 100644
--- a/CGL/src/path.cpp
+++ b/CGL/src/path.cpp
@@ -1,4 +1,5 @@
 #include <string>
+#include <stdlib.h>
 using std::string;
 
 #ifdef WIN32