diff --git a/app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt
index 12c7125b..b5f171bc 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt
@@ -340,7 +340,7 @@ class AccountActivity : AppCompatActivity() {
                     if (((mediaNat == "stun") || (mediaNat == "ice")) && (newStunServer == ""))
                         newStunServer = resources.getString(R.string.stun_server_default)
                     if (!Utils.checkStunUri(newStunServer) ||
-                            ((mediaNat == "turn") && !newStunServer.startsWith("turn"))) {
+                            ((mediaNat == "turn") && !newStunServer.startsWith("turn:"))) {
                         Utils.alertView(this, getString(R.string.notice),
                                 String.format(getString(R.string.invalid_stun_server), newStunServer))
                         return false
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
index fce27dca..dfc6bd1e 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
@@ -125,8 +125,7 @@ object Utils {
     }
 
     fun checkStunUri(uri: String): Boolean {
-        if (!uri.startsWith("stun:") && !uri.startsWith("stuns:") &&
-                !uri.startsWith("turn:") && !uri.startsWith("turns:"))
+        if (!uri.startsWith("stun:") && !uri.startsWith("turn:"))
             return false
         return checkHostPort(uri.substringAfter(":"))
     }
diff --git a/app/src/main/res/values-fi/strings.xml b/app/src/main/res/values-fi/strings.xml
index 1db6674c..fee33030 100644
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@@ -131,8 +131,8 @@
     </string>
     <string name="stun_server">STUN/TURN-palvelin</string>
     <string name="stun_server_help">STUN/TURN-palvelimen muotoa \'kaava:palvelin[:portti]\'
-        oleva URI, missä kaava on \'stun\', \'stuns\', \'turn\' tai \'turns\'. Oletus STUN-palvelin
-        STUN ja ICE protokollille on \'stun:stun.l.google.com:19302\', joka osoittaa Google:n
+        oleva URI, missä kaava on \'stun\' tai \'turn\'. Oletus STUN-palvelin
+        STUN- ja ICE-protokollille on \'stun:stun.l.google.com:19302\', joka osoittaa Google:n
         julkiseen STUN-palvelimeen. TURN-palvelimella ei ole oletusarvoa.
     </string>
     <string name="stun_server_uri">STUN/TURN-palvelimen URI</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f73b0f26..898b2c00 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -126,7 +126,7 @@
     </string>
     <string name="stun_server">STUN/TURN Server</string>
     <string name="stun_server_help">A STUN/TURN Server URI of form scheme:host[:port], where scheme
-        is \'stun\', \'stuns\', \'turn\', or \'turns\'. Factory default STUN Server for STUN and
+        is \'stun\' or \'turn\'. Factory default STUN Server for STUN and
         ICE protocols is \'stun:stun.l.google.com:19302\' pointing to public Google STUN server.
         There is no factory default TURN server.
     </string>