Index: src/OFSocket.m
==================================================================
--- src/OFSocket.m
+++ src/OFSocket.m
@@ -232,11 +232,11 @@
 		CloseLibrary(socketBase);
 }
 #endif
 
 int
-OFSocketErrNo()
+OFSocketErrNo(void)
 {
 #if defined(OF_WINDOWS)
 	switch (WSAGetLastError()) {
 	case WSAEACCES:
 		return EACCES;

Index: src/runtime/amiga-library.m
==================================================================
--- src/runtime/amiga-library.m
+++ src/runtime/amiga-library.m
@@ -41,11 +41,11 @@
 # define OBJC_M68K_REG(reg)
 #endif
 
 /* This always needs to be the first thing in the file. */
 int
-_start()
+_start(void)
 {
 	return -1;
 }
 
 #ifdef OF_AMIGAOS_M68K

Index: src/runtime/autorelease.m
==================================================================
--- src/runtime/autorelease.m
+++ src/runtime/autorelease.m
@@ -61,11 +61,11 @@
 		OBJC_ERROR("Failed to create TLS keys!");
 }
 #endif
 
 void *
-objc_autoreleasePoolPush()
+objc_autoreleasePoolPush(void)
 {
 #if !defined(OF_HAVE_COMPILER_TLS) && defined(OF_HAVE_THREADS)
 	uintptr_t count = (uintptr_t)OFTLSKeyGet(countKey);
 #endif
 	return (void *)count;

Index: src/runtime/class.m
==================================================================
--- src/runtime/class.m
+++ src/runtime/class.m
@@ -403,11 +403,11 @@
 
 	objc_globalMutex_unlock();
 }
 
 static void
-processLoadQueue()
+processLoadQueue(void)
 {
 	for (size_t i = 0; i < loadQueueCount; i++) {
 		setUpClass(loadQueue[i]);
 
 		if (loadQueue[i]->info & OBJC_CLASS_INFO_SETUP) {

Index: src/runtime/static-instances.m
==================================================================
--- src/runtime/static-instances.m
+++ src/runtime/static-instances.m
@@ -93,11 +93,11 @@
 		}
 	}
 }
 
 void
-objc_forgetPendingStaticInstances()
+objc_forgetPendingStaticInstances(void)
 {
 	free(staticInstancesList);
 	staticInstancesList = NULL;
 	staticInstancesCount = 0;
 }

Index: tests/objc_sync/test.m
==================================================================
--- tests/objc_sync/test.m
+++ tests/objc_sync/test.m
@@ -43,25 +43,25 @@
 	return nil;
 }
 @end
 
 int
-main()
+main(void)
 {
 	MyThread *t1, *t2;
 
 	lock = [[OFObject alloc] init];
 
 	t1 = [MyThread thread];
-	[t1 setName: @"A"];
+	t1.name = @"A";
 
 	t2 = [MyThread thread];
-	[t2 setName: @"B"];
+	t2.name = @"B";
 
 	[t1 start];
 	[t2 start];
 
 	[t1 join];
 	[t2 join];
 
 	return 0;
 }