diff --git a/objc/message.h b/objc/message.h
new file mode 100644
index 0000000..d2f3831
--- /dev/null
+++ b/objc/message.h
@@ -0,0 +1,58 @@
+#ifndef _OBJC_MESSAGE_H_
+#define _OBJC_MESSAGE_H_
+
+#if defined(__x86_64) || defined(__i386) || defined(__arm__) || \
+	defined(__mips_n64) || defined(__mips_n32)
+/**
+ * Standard message sending function.  This function must be cast to the
+ * correct types for the function before use.  The first argument is the
+ * receiver and the second the selector.
+ *
+ * Note that this function is not available on all architectures.  For a more
+ * portable solution to sending arbitrary messages, consider using
+ * objc_msg_lookup_sender() and then calling the returned IMP directly.
+ *
+ * This version of the function is used for all messages that return either an
+ * integer, a pointer, or a small structure value that is returned in
+ * registers.  Be aware that calling conventions differ between operating
+ * systems even within the same architecture, so take great care if using this
+ * function for small (two integer) structures.
+ */
+id objc_msgSend(id self, SEL _cmd, ...);
+/**
+ * Standard message sending function.  This function must be cast to the
+ * correct types for the function before use.  The first argument is the
+ * receiver and the second the selector.
+ *
+ * Note that this function is not available on all architectures.  For a more
+ * portable solution to sending arbitrary messages, consider using
+ * objc_msg_lookup_sender() and then calling the returned IMP directly.
+ *
+ * This version of the function is used for all messages that return a
+ * structure that is not returned in registers.  Be aware that calling
+ * conventions differ between operating systems even within the same
+ * architecture, so take great care if using this function for small (two
+ * integer) structures.
+ */
+#ifdef __cplusplus
+id objc_msgSend_stret(id self, SEL _cmd, ...);
+#else
+void objc_msgSend_stret(id self, SEL _cmd, ...);
+#endif
+/**
+ * Standard message sending function.  This function must be cast to the
+ * correct types for the function before use.  The first argument is the
+ * receiver and the second the selector.
+ *
+ * Note that this function is not available on all architectures.  For a more
+ * portable solution to sending arbitrary messages, consider using
+ * objc_msg_lookup_sender() and then calling the returned IMP directly.
+ *
+ * This version of the function is used for all messages that return floating
+ * point values.
+ */
+long double objc_msgSend_fpret(id self, SEL _cmd, ...);
+
+#endif
+
+#endif //_OBJC_MESSAGE_H_