diff --git a/debian/wit-network-config.postinst b/debian/wit-network-config.postinst
index 925b88e..943214c 100755
--- a/debian/wit-network-config.postinst
+++ b/debian/wit-network-config.postinst
@@ -223,7 +223,7 @@ case "$1" in
                 cat <<-EOF >>$IFCONFIG
 			auto ${if}
 			iface ${if} inet static
-			    address $ipv4
+			    address ${ipv4/\\/}
 
 
 		EOF