diff --git a/AUTHORS b/AUTHORS
index 7fcc9c14b..825c87b96 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -24,4 +24,5 @@ With thanks to:
   Russell Friesenhahn
   Paolo Marsi
   Eric Farris
+  Benjamin Tegarden
 
diff --git a/src/Grid.cpp b/src/Grid.cpp
index bd1f0f6f5..59e366b32 100644
--- a/src/Grid.cpp
+++ b/src/Grid.cpp
@@ -60,6 +60,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <iostream>
+#include <stdlib.h>
 #include <Grid.h>
 
 ////////////////////////////////////////////////////////////////////////////////