@@ -254,10 +254,13 @@
 
 		AS_IF([test x"$enable_seluid16" = x"yes"], [
 			AC_DEFINE(OF_SELUID16, 1,
 				[Whether to use 16 bit selector UIDs])
 		])
+
+		AX_CHECK_COMPILER_FLAGS(-Wno-deprecated-objc-isa-usage,
+			[OBJCFLAGS="$OBJCFLAGS -Wno-deprecated-objc-isa-usage"])
 		;;
 	"Apple runtime")
 		AC_DEFINE(OF_APPLE_RUNTIME, 1,
 			[Whether we use the Apple ObjC runtime])