diff --git a/BeefLibs/corlib/src/Interop.bf b/BeefLibs/corlib/src/Interop.bf
new file mode 100644
index 00000000..9871330d
--- /dev/null
+++ b/BeefLibs/corlib/src/Interop.bf
@@ -0,0 +1,26 @@
+namespace System
+{
+	namespace Interop
+	{
+		typealias c_short = int16;
+		typealias c_ushort = uint16;
+		typealias c_int = int32;
+		typealias c_uint = uint32;
+		typealias c_longlong = int64;
+		typealias c_ulonglong = uint64;
+		typealias c_intptr = int;
+		typealias c_uintptr = uint;
+		typealias c_char = char8;
+		typealias c_uchar = uint8;
+
+#if BF_PLATFORM_WINDOWS
+		typealias c_long = int32;
+		typealias c_ulong = uint32;
+		typealias c_wchar = char16;
+#else
+		typealias c_long = int64;
+		typealias c_ulong = uint64;
+		typealias c_wchar = char32;
+#endif
+	}
+}