diff --git a/Troubleshooting.md b/Troubleshooting.md
index 87f9bcf..4b32116 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -8,6 +8,19 @@ The in-built batch-renamer implemented in `nnn` is a very simplified one. It's s
 
 `nnn` may not handle keypresses correctly when used with tmux (see issue #104 for more details). Set `TERM=xterm-256color` to address it.
 
+## Broken control key
+
+If a Ctrl-key combination is not working, check if it's masked due to terminal line settings:
+
+    stty -a
+
+If that's the case, clear (`undef`) the setting. E.g.:
+
+    stty start undef
+    stty stop undef
+    stty lwrap undef
+    stty lnext undef
+
 ## BSD terminal issue
 
 **TL;DR:** On releases previous to v2.7, use the keybind <kbd>K</kbd> to toggle selection if you are having issues with <kbd>^Y</kbd>.