diff --git a/TestScripts/C Tests/main.c b/TestScripts/C Tests/main.c
index 3da7739..430db3d 100644
--- a/TestScripts/C Tests/main.c	
+++ b/TestScripts/C Tests/main.c	
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <string.h>
 #include <math.h>
 #include "xplaneconnect.h"
 
diff --git a/xpcPlugin/xpcDrawing.cpp b/xpcPlugin/xpcDrawing.cpp
index c6ea545..3f334a8 100644
--- a/xpcPlugin/xpcDrawing.cpp
+++ b/xpcPlugin/xpcDrawing.cpp
@@ -1,6 +1,8 @@
 #include "xpcDrawing.h"
 #include "XPLMDisplay.h"
 #include "XPLMGraphics.h"
+#include <stdlib.h>
+#include <string.h>
 
 //Internal Memory
 static int msgEnabled = 0;