Index: utils/ofzip/GZIPArchive.m
==================================================================
--- utils/ofzip/GZIPArchive.m
+++ utils/ofzip/GZIPArchive.m
@@ -42,11 +42,11 @@
 
 @implementation GZIPArchive
 + (void)initialize
 {
 	if (self == [GZIPArchive class])
-		app = [[OFApplication sharedApplication] delegate];
+		app = (OFZIP*)[[OFApplication sharedApplication] delegate];
 }
 
 + (instancetype)archiveWithStream: (OF_KINDOF(OFStream*))stream
 {
 	return [[[self alloc] initWithStream: stream] autorelease];

Index: utils/ofzip/TarArchive.m
==================================================================
--- utils/ofzip/TarArchive.m
+++ utils/ofzip/TarArchive.m
@@ -51,11 +51,11 @@
 
 @implementation TarArchive
 + (void)initialize
 {
 	if (self == [TarArchive class])
-		app = [[OFApplication sharedApplication] delegate];
+		app = (OFZIP*)[[OFApplication sharedApplication] delegate];
 }
 
 + (instancetype)archiveWithStream: (OF_KINDOF(OFStream*))stream
 {
 	return [[[self alloc] initWithStream: stream] autorelease];

Index: utils/ofzip/ZIPArchive.m
==================================================================
--- utils/ofzip/ZIPArchive.m
+++ utils/ofzip/ZIPArchive.m
@@ -52,11 +52,11 @@
 
 @implementation ZIPArchive
 + (void)initialize
 {
 	if (self == [ZIPArchive class])
-		app = [[OFApplication sharedApplication] delegate];
+		app = (OFZIP*)[[OFApplication sharedApplication] delegate];
 }
 
 + (instancetype)archiveWithStream: (OF_KINDOF(OFStream*))stream
 {
 	return [[[self alloc] initWithStream: stream] autorelease];