diff --git a/src/platform/objc_message.zig b/src/platform/objc_message.zig
new file mode 100644
index 00000000..3b14412b
--- /dev/null
+++ b/src/platform/objc_message.zig
@@ -0,0 +1,9 @@
+// Extracted from `zig translate-c tmp.c` with `#include <objc/message.h>` in the file.
+pub const struct_objc_selector = opaque {};
+pub const SEL = ?*struct_objc_selector;
+pub const Class = ?*struct_objc_class;
+pub const struct_objc_class = opaque {};
+
+pub extern fn sel_getUid(str: [*c]const u8) SEL;
+pub extern fn objc_getClass(name: [*c]const u8) Class;
+pub extern fn objc_msgSend() void;