Index: src/runtime/runtime-private.h
==================================================================
--- src/runtime/runtime-private.h
+++ src/runtime/runtime-private.h
@@ -121,19 +121,10 @@
 	const void *buckets[256];
 	BOOL empty;
 };
 #endif
 
-
-enum objc_abi_class_info {
-	OBJC_CLASS_INFO_CLASS	    = 0x001,
-	OBJC_CLASS_INFO_METACLASS   = 0x002,
-	OBJC_CLASS_INFO_SETUP	    = 0x100,
-	OBJC_CLASS_INFO_LOADED	    = 0x200,
-	OBJC_CLASS_INFO_INITIALIZED = 0x400
-};
-
 typedef struct {
 	of_mutex_t mutex;
 	of_thread_t owner;
 	int count;
 } objc_mutex_t;

Index: src/runtime/runtime.h
==================================================================
--- src/runtime/runtime.h
+++ src/runtime/runtime.h
@@ -38,11 +38,20 @@
 	void *sibling_class;
 	struct objc_protocol_list *protocols;
 	void *gc_object_type;
 	unsigned long abi_version;
 	void *ivar_offsets;
-	void *properties;
+	struct objc_property_list *properties;
+};
+
+enum objc_abi_class_info {
+	OBJC_CLASS_INFO_CLASS	    = 0x001,
+	OBJC_CLASS_INFO_METACLASS   = 0x002,
+	OBJC_CLASS_INFO_NEW_ABI	    = 0x010,
+	OBJC_CLASS_INFO_SETUP	    = 0x100,
+	OBJC_CLASS_INFO_LOADED	    = 0x200,
+	OBJC_CLASS_INFO_INITIALIZED = 0x400
 };
 
 struct objc_object {
 	Class isa;
 };
@@ -84,10 +93,35 @@
 
 struct objc_ivar_list {
 	unsigned count;
 	struct objc_ivar ivars[1];
 };
+
+#define OBJC_PROPERTY_READONLY	0x01
+#define OBJC_PROPERTY_GETTER	0x02
+#define OBJC_PROPERTY_ASSIGN	0x04
+#define OBJC_PROPERTY_READWRITE	0x08
+#define OBJC_PROPERTY_RETAIN	0x10
+#define OBJC_PROPERTY_COPY	0x20
+#define OBJC_PROPERTY_NONATOMIC	0x40
+#define OBJC_PROPERTY_SETTER	0x80
+
+struct objc_property {
+	const char *name;
+	unsigned char attributes;
+	BOOL synthesized;
+	struct {
+		const char *name;
+		const char *type;
+	} getter, setter;
+};
+
+struct objc_property_list {
+	unsigned count;
+	struct objc_property_list *next;
+	struct objc_property properties[1];
+};
 
 #ifdef __OBJC__
 @interface Protocol
 {
 @public