diff --git a/src/touchscreen.cc b/src/touchscreen.cc
index 0417876..c1b8df0 100644
--- a/src/touchscreen.cc
+++ b/src/touchscreen.cc
@@ -3,6 +3,7 @@
 #include <v8.h>
 #include <node.h>
 #include <nan.h>
+#include <unistd.h>
 
 using namespace v8;
 using namespace node;