diff --git a/build/jam/images/NetBootArchive b/build/jam/images/NetBootArchive
index 1726b249ce..b7a898abbe 100644
--- a/build/jam/images/NetBootArchive
+++ b/build/jam/images/NetBootArchive
@@ -7,7 +7,7 @@ SYSTEM_NETWORK_DATALINK_PROTOCOLS = ethernet_frame <module>arp loopback_frame ;
 SYSTEM_NETWORK_PROTOCOLS = ipv4 tcp udp icmp unix ;
 
 SYSTEM_ADD_ONS_DRIVERS_NET = [ FFilterByBuildFeatures
-	x86 @{
+	x86,x86_64 @{
 		3com
 		atheros813x
 		atheros81xx
@@ -22,7 +22,7 @@ SYSTEM_ADD_ONS_DRIVERS_NET = [ FFilterByBuildFeatures
 		sis900
 		syskonnect
 		attansic_l2
-	}@ # x86
+	}@ # x86,x86_64
 
 	rtl81xx
 	etherpci
diff --git a/src/system/boot/loader/file_systems/tarfs/tarfs.cpp b/src/system/boot/loader/file_systems/tarfs/tarfs.cpp
index 2f3460b752..b8f2f706ec 100644
--- a/src/system/boot/loader/file_systems/tarfs/tarfs.cpp
+++ b/src/system/boot/loader/file_systems/tarfs/tarfs.cpp
@@ -35,7 +35,7 @@
 
 static const uint32 kFloppyArchiveOffset = BOOT_ARCHIVE_IMAGE_OFFSET * 1024;
 	// defined at build time, see build/jam/BuildSetup
-static const size_t kTarRegionSize = 9 * 1024 * 1024;	// 9 MB
+static const size_t kTarRegionSize = 11 * 1024 * 1024; // 11 MB
 
 
 using std::nothrow;