--- a/h_osx.rc	Sat Jun 16 00:53:26 2018 +0200
+++ b/h_osx.rc	Fri Jul 27 09:56:31 2018 +0200
@@ -23,7 +23,8 @@
 	  , ' -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks'
 	  , ' -framework Foundation'
 	  , ' -framework ApplicationServices'
-	  , ' -framework CoreFoundation'.
+	  , ' -framework CoreFoundation'
+	  , ' -lobjc'.
 
     "/ includePath: -I../../include
     "/ link args: -shared -mmacosx-version-min=10.3 -arch x86_64 librun.so