diff --git a/telldus-core/service/EventUpdateManager.cpp b/telldus-core/service/EventUpdateManager.cpp
index d237c5ba..cf6b8718 100644
--- a/telldus-core/service/EventUpdateManager.cpp
+++ b/telldus-core/service/EventUpdateManager.cpp
@@ -14,6 +14,7 @@
 #include <string.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <unistd.h>
 #endif  // _LINUX
 
 #include <list>