diff --git a/README.org b/README.org
index a2550f6..d058eac 100644
--- a/README.org
+++ b/README.org
@@ -157,6 +157,7 @@ Here are a list of packages that I like to have on all machines.
 vim
 wget
 killall
+tmux
 discover
 kde-rounded-corners
 lightly-qt
diff --git a/system/kaladin/configuration.nix b/system/kaladin/configuration.nix
index c38924b..8b9158c 100644
--- a/system/kaladin/configuration.nix
+++ b/system/kaladin/configuration.nix
@@ -136,6 +136,7 @@
     vim
     wget
     killall
+    tmux
     discover
     kde-rounded-corners
     lightly-qt
diff --git a/system/syl/configuration.nix b/system/syl/configuration.nix
index d0db4d8..c647d06 100644
--- a/system/syl/configuration.nix
+++ b/system/syl/configuration.nix
@@ -156,6 +156,7 @@
     vim
     wget
     killall
+    tmux
     discover
     kde-rounded-corners
     lightly-qt