Update README.md

1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index 86f59f8..c629374 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,8 @@ Add two files to ~/.config/bspwm
 
 * terminals - list of classes of terminals that you want to be swallowed
 
+If a class isn't available (such as with xev) then the command of origin can be used.
+
 (example files are included in "examples")
 
 Place bspswallow into your PATH and add the following line to your bspwmrc.