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diff --git a/README.md b/README.md
index d02375b..52d1caa 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ Emacs configuration file
 - Refactor : `F2`
 - Move line up/down: `M-<UP/DOWN>`
 - Find references: `M-?`
+- Kill buffer: `C-x k`
 
 
 ## Per-language Features