diff --git a/AK/Types.h b/AK/Types.h
index a5bbc0846a8..9655c748dfe 100644
--- a/AK/Types.h
+++ b/AK/Types.h
@@ -147,6 +147,7 @@ using __ptrdiff_t = __PTRDIFF_TYPE__;
 #    if defined(AK_OS_WINDOWS)
 using ssize_t = AK::Detail::MakeSigned<size_t>;
 using mode_t = unsigned short;
+using pid_t = int;
 #    endif
 #endif