@@ -18,12 +18,15 @@
 
 #import "OFDataArray.h"
 #import "OFExceptions.h"
 #import "OFMacros.h"
 
-static size_t lastpagebyte = 0;
-extern int getpagesize(void);
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+static int lastpagebyte = 0;
 
 @implementation OFDataArray
 + dataArrayWithItemSize: (size_t)is
 {
 	return [[[self alloc] initWithItemSize: is] autorelease];
@@ -185,12 +188,21 @@
 @implementation OFBigDataArray
 - initWithItemSize: (size_t)is
 {
 	self = [super initWithItemSize: is];
 
-	if (lastpagebyte == 0)
-		lastpagebyte = getpagesize() - 1;
+	if (lastpagebyte == 0) {
+#ifndef _WIN32
+		if ((lastpagebyte = sysconf(_SC_PAGESIZE)) == -1)
+			lastpagebyte = 4096;
+		lastpagebyte--;
+#else
+		SYSTEM_INFO si;
+		GetSystemInfo(&si);
+		lastpagebyte = si.dwPageSize - 1;
+#endif
+	}
 
 	return self;
 }
 
 - addItem: (void*)item