Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -76,12 +76,10 @@
 ])
 AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32 -Werror,
 	[OBJCFLAGS="$OBJCFLAGS -Wshorten-64-to-32"])
 AX_CHECK_COMPILER_FLAGS(-Wsemicolon-before-method-body -Werror,
 	[OBJCFLAGS="$OBJCFLAGS -Wsemicolon-before-method-body"])
-AX_CHECK_COMPILER_FLAGS([-Wno-deprecated-objc-pointer-introspection -Werror],
-	[OBJCFLAGS="$OBJCFLAGS -Wno-deprecated-objc-pointer-introspection"])
 
 case "$OBJC" in
 	*clang*)
 		ASFLAGS="$ASFLAGS -no-integrated-as"
 		;;

Index: src/runtime/class.m
==================================================================
--- src/runtime/class.m
+++ src/runtime/class.m
@@ -524,11 +524,11 @@
 
 	if (classes_cnt < count)
 		count = classes_cnt;
 
 	for (i = j = 0; i < classes->size; i++) {
-		Class cls;
+		void *cls;
 
 		if (j >= count) {
 			objc_global_mutex_unlock();
 			return j;
 		}
@@ -859,11 +859,11 @@
 	if (classes == NULL)
 		return;
 
 	for (i = 0; i < classes->size; i++) {
 		if (classes->data[i] != NULL) {
-			Class cls = (Class)classes->data[i]->obj;
+			void *cls = (Class)classes->data[i]->obj;
 
 			if (cls == Nil || (uintptr_t)cls & 1)
 				continue;
 
 			objc_unregister_class(cls);