Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -490,10 +490,13 @@
 	AC_MSG_RESULT(no)
 	AC_DEFINE(SSIZE_MAX, [((ssize_t)(SIZE_MAX / 2))],
 		[Maximum value for ssize_t])
 ])
 
+AC_CHECK_HEADER(sys/types.h,
+	[AC_DEFINE(OF_HAVE_SYS_TYPES_H, 1, [Whether we have <sys/types.h>])])
+
 AC_CHECK_TYPE(max_align_t,
 	[AC_DEFINE(OF_HAVE_MAX_ALIGN_T, 1, [Whether we have max_align_t])])
 
 AC_CHECK_HEADER(stdnoreturn.h,
 	[AC_DEFINE(OF_HAVE_STDNORETURN_H, 1, [Whether we have stdnoreturn.h])])
@@ -1060,11 +1063,11 @@
 	esac
 
 	AC_MSG_CHECKING(for getaddrinfo)
 	AC_TRY_COMPILE([
 		#include <stddef.h>
-		#ifndef _WIN32
+		#ifdef OF_HAVE_SYS_TYPES_H
 		# include <sys/types.h>
 		#endif
 		#ifdef HAVE_SYS_SOCKET_H
 		# include <sys/socket.h>
 		#endif
@@ -1113,11 +1116,11 @@
 			esac
 
 			AS_IF([test x"$have_threadsafe_getaddrinfo" = \
 					x"unknown"], [
 				AC_EGREP_CPP(yes, [
-					#ifndef _WIN32
+					#ifdef OF_HAVE_SYS_TYPES_H
 					# include <sys/types.h>
 					#endif
 					#ifdef HAVE_SYS_SOCKET_H
 					# include <sys/socket.h>
 					#endif

Index: src/OFMutableString.m
==================================================================
--- src/OFMutableString.m
+++ src/OFMutableString.m
@@ -18,12 +18,10 @@
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <sys/types.h>
-
 #import "OFString.h"
 #import "OFMutableString_UTF8.h"
 
 #import "OFInvalidArgumentException.h"
 #import "OFInvalidFormatException.h"

Index: src/OFNumber.h
==================================================================
--- src/OFNumber.h
+++ src/OFNumber.h
@@ -19,11 +19,15 @@
 #endif
 #ifndef __STDC_CONSTANT_MACROS
 # define __STDC_CONSTANT_MACROS
 #endif
 
-#include <sys/types.h>
+#include "objfw-defs.h"
+
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #import "OFObject.h"
 #import "OFSerialization.h"
 #import "OFJSONRepresentation.h"
 #import "OFMessagePackRepresentation.h"

Index: src/OFProcess.h
==================================================================
--- src/OFProcess.h
+++ src/OFProcess.h
@@ -19,11 +19,15 @@
 #endif
 #ifndef __STDC_CONSTANT_MACROS
 # define __STDC_CONSTANT_MACROS
 #endif
 
-#include <sys/types.h>
+#include "objfw-defs.h"
+
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #import "OFStream.h"
 #import "OFString.h"
 
 #ifdef OF_WINDOWS

Index: src/OFSeekableStream.h
==================================================================
--- src/OFSeekableStream.h
+++ src/OFSeekableStream.h
@@ -19,11 +19,15 @@
 #endif
 #ifndef __STDC_CONSTANT_MACROS
 # define __STDC_CONSTANT_MACROS
 #endif
 
-#include <sys/types.h>
+#include "objfw-defs.h"
+
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #import "OFStream.h"
 
 OF_ASSUME_NONNULL_BEGIN
 

Index: src/OFString_UTF8.m
==================================================================
--- src/OFString_UTF8.m
+++ src/OFString_UTF8.m
@@ -18,11 +18,13 @@
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <sys/types.h>
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #import "OFString_UTF8.h"
 #import "OFString_UTF8+Private.h"
 #import "OFMutableString_UTF8.h"
 #import "OFArray.h"

Index: src/OFXMLParser.m
==================================================================
--- src/OFXMLParser.m
+++ src/OFXMLParser.m
@@ -16,12 +16,10 @@
 
 #include "config.h"
 
 #include <string.h>
 
-#include <sys/types.h>
-
 #import "OFXMLParser.h"
 #import "OFString.h"
 #import "OFArray.h"
 #import "OFDictionary.h"
 #import "OFBigDataArray.h"
@@ -105,17 +103,14 @@
 	size_t count = [namespaces count];
 
 	if (prefix == nil)
 		prefix = @"";
 
-	if (count - 1 > SSIZE_MAX)
-		@throw [OFOutOfRangeException exception];
-
-	for (ssize_t i = count - 1; i >= 0; i--) {
+	while (count > 0) {
 		OFString *tmp;
 
-		if ((tmp = [objects[i] objectForKey: prefix]) != nil)
+		if ((tmp = [objects[--count] objectForKey: prefix]) != nil)
 			return tmp;
 	}
 
 	return nil;
 }

Index: src/objfw-defs.h.in
==================================================================
--- src/objfw-defs.h.in
+++ src/objfw-defs.h.in
@@ -28,13 +28,14 @@
 #undef OF_HAVE_SOCKETS
 #undef OF_HAVE_STDNORETURN
 #undef OF_HAVE_SYMLINK
 #undef OF_HAVE_SYNC_BUILTINS
 #undef OF_HAVE_SYS_SOCKET_H
+#undef OF_HAVE_SYS_TYPES_H
 #undef OF_HAVE_THREADS
 #undef OF_HAVE_UNICODE_TABLES
 #undef OF_HAVE__THREAD_LOCAL
 #undef OF_HAVE___THREAD
 #undef OF_NINTENDO_DS
 #undef OF_OBJFW_RUNTIME
 #undef OF_UNIVERSAL
 #undef SIZE_MAX

Index: src/of_asprintf.m
==================================================================
--- src/of_asprintf.m
+++ src/of_asprintf.m
@@ -31,11 +31,13 @@
 #endif
 #ifdef HAVE_XLOCALE_H
 # include <xlocale.h>
 #endif
 
-#include <sys/types.h>
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #import "OFString.h"
 #import "OFLocalization.h"
 
 #import "OFInitializationFailedException.h"