diff --git a/assets/disk0/nettest.js b/assets/disk0/nettest.js
index 0195f77..8f8ea83 100644
--- a/assets/disk0/nettest.js
+++ b/assets/disk0/nettest.js
@@ -1,4 +1,4 @@
-let url="http://localhost/testnet/test.txt"
+let url="http:localhost/testnet/test.txt"
 
 let file = files.open("B:\\"+url)
 
diff --git a/tsvm_core/src/net/torvald/tsvm/peripheral/HttpModem.kt b/tsvm_core/src/net/torvald/tsvm/peripheral/HttpModem.kt
index 7afc396..8906bef 100644
--- a/tsvm_core/src/net/torvald/tsvm/peripheral/HttpModem.kt
+++ b/tsvm_core/src/net/torvald/tsvm/peripheral/HttpModem.kt
@@ -11,6 +11,10 @@ import java.net.URL
 
 
 /**
+ * To get a text from the web address, send message: `GET https:en.wikipedia.org/wiki/Http`
+ *
+ * Note that there is no double-slash after the protocol (or scheme)
+ *
  * Created by minjaesong on 2022-09-22.
  */
 class HttpModem(private val vm: VM) : BlockTransferInterface(false, true) {
@@ -115,6 +119,8 @@ class HttpModem(private val vm: VM) : BlockTransferInterface(false, true) {
                 printdbg("msg: $inputString, lastIndex: ${inputString.lastIndex}")
 
                 cnxUrl = inputString.substring(4).filter { it in '!'..'~' }
+                val protocolSep = cnxUrl!!.indexOf(':')
+                cnxUrl = cnxUrl!!.substring(0, protocolSep) + "://" + cnxUrl!!.substring(protocolSep + 1)
 
                 printdbg("URL: $cnxUrl")