diff --git a/FEXCore/Source/Utils/AllocatorHooks.cpp b/FEXCore/Source/Utils/AllocatorHooks.cpp
index 60bfabf87..cd0171b8a 100644
--- a/FEXCore/Source/Utils/AllocatorHooks.cpp
+++ b/FEXCore/Source/Utils/AllocatorHooks.cpp
@@ -5,6 +5,7 @@
 
 #include <malloc.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 namespace FEXCore::Allocator {