diff --git a/src/OSSupport/StackTrace.cpp b/src/OSSupport/StackTrace.cpp
index 57c547fa1..a56568457 100644
--- a/src/OSSupport/StackTrace.cpp
+++ b/src/OSSupport/StackTrace.cpp
@@ -9,6 +9,7 @@
 	#include "../StackWalker.h"
 #else
 	#include <execinfo.h>
+	#include <unistd.h>
 #endif