Index: src/OFObject.h
==================================================================
--- src/OFObject.h
+++ src/OFObject.h
@@ -56,11 +56,11 @@
 
 #if defined(__clang__)
 # define OF_HAVE_PROPERTIES
 # define OF_HAVE_OPTIONAL_PROTOCOLS
 # define OF_HAVE_FAST_ENUMERATION
-#elif __GCC_VERSION__ >= 406
+#elif __GCC_VERSION__ >= 406 || defined(OBJC_NEW_PROPERTIES)
 # define OF_HAVE_PROPERTIES
 # define OF_HAVE_OPTIONAL_PROTOCOLS
 # define OF_HAVE_FAST_ENUMERATION
 #endif