diff --git a/res/values/strings.xml b/res/values/strings.xml
index 657a1ba..3196618 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -114,7 +114,8 @@
     <string name="callFailed_unobtainable_number">Invalid number</string>
     <!-- In-call screen: message displayed in an error dialog -->
     <string name="incall_error_missing_voicemail_number">Voicemail number unknown.</string>
-
+    <!-- In-call screen: call failed because you cannot make video calls when TTY is enabled. -->
+    <string name="callFailed_video_call_tty_enabled">Cannot make video calls when TTY is enabled.</string>
     <!-- Choice in the ringtone picker.  If chosen, there will be silence instead of a ringtone played. -->
     <string name="ringtone_silent">None</string>
     <!-- If there is ever a ringtone set for some setting, but that ringtone can no longer be resolved, this is shown instead.  For example, if the ringtone was on a SD card and it had been removed, this would be shown for ringtones on that SD card. -->