diff --git a/tools/aidl/Type.cpp b/tools/aidl/Type.cpp
index d572af6d2aab7..2267750623ad7 100644
--- a/tools/aidl/Type.cpp
+++ b/tools/aidl/Type.cpp
@@ -1,5 +1,7 @@
 #include "Type.h"
 
+#include <sys/types.h>
+
 Namespace NAMES;
 
 Type* VOID_TYPE;