Index: src/OFAutoreleasePool.m
==================================================================
--- src/OFAutoreleasePool.m
+++ src/OFAutoreleasePool.m
@@ -36,10 +36,13 @@
 }
 
 @implementation OFAutoreleasePool
 + (void)initialize
 {
+	if (self != [OFAutoreleasePool class])
+		return;
+
 	pool_list_key = [[OFTLSKey alloc] initWithDestructor: release_list];
 }
 
 + (void)addToPool: (OFObject*)obj
 {

Index: src/OFSocket.m
==================================================================
--- src/OFSocket.m
+++ src/OFSocket.m
@@ -24,10 +24,13 @@
 @implementation OFSocket
 #ifdef _WIN32
 + (void)initialize
 {
 	WSADATA wsa;
+
+	if (self != [OFSocket class])
+		return;
 
 	if (WSAStartup(MAKEWORD(2, 0), &wsa))
 		@throw [OFInitializationFailedException newWithClass: self];
 }
 #endif