Index: src/runtime/class.m
==================================================================
--- src/runtime/class.m
+++ src/runtime/class.m
@@ -135,11 +135,11 @@
 {
 	struct objc_method_list *ml;
 	struct objc_category **cats;
 	unsigned int i;
 
-	if (!(cls->info & OBJC_CLASS_INFO_INITIALIZED))
+	if (!(cls->info & OBJC_CLASS_INFO_DTABLE))
 		return;
 
 	if (cls->dtable == empty_dtable)
 		cls->dtable = objc_sparsearray_new();
 
@@ -240,20 +240,23 @@
 		return;
 
 	if (cls->superclass)
 		initialize_class(cls->superclass);
 
+	cls->info |= OBJC_CLASS_INFO_DTABLE;
+	cls->isa->info |= OBJC_CLASS_INFO_DTABLE;
+
+	objc_update_dtable(cls);
+	objc_update_dtable(cls->isa);
+
 	/*
 	 * Set it first to prevent calling it recursively due to message sends
 	 * in the initialize method
 	 */
 	cls->info |= OBJC_CLASS_INFO_INITIALIZED;
 	cls->isa->info |= OBJC_CLASS_INFO_INITIALIZED;
 
-	objc_update_dtable(cls);
-	objc_update_dtable(cls->isa);
-
 	call_method(cls, "initialize");
 }
 
 void
 objc_initialize_class(Class cls)
@@ -534,19 +537,16 @@
 static void
 free_class(Class rcls)
 {
 	struct objc_abi_class *cls = (struct objc_abi_class*)rcls;
 
-	if (!(rcls->info & OBJC_CLASS_INFO_INITIALIZED))
-		return;
-
 	if (rcls->subclass_list != NULL) {
 		free(rcls->subclass_list);
 		rcls->subclass_list = NULL;
 	}
 
-	if (rcls->dtable != NULL)
+	if (rcls->dtable != NULL && rcls->dtable != empty_dtable)
 		objc_sparsearray_free(rcls->dtable);
 
 	rcls->dtable = NULL;
 
 	if (rcls->superclass != Nil)

Index: src/runtime/runtime.h
==================================================================
--- src/runtime/runtime.h
+++ src/runtime/runtime.h
@@ -57,11 +57,12 @@
 	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
+	OBJC_CLASS_INFO_DTABLE	    = 0x400,
+	OBJC_CLASS_INFO_INITIALIZED = 0x800
 };
 
 struct objc_object {
 	Class isa;
 };