diff --git a/auto_config.sh b/auto_config.sh
index eb409c1..593e93e 100755
--- a/auto_config.sh
+++ b/auto_config.sh
@@ -113,6 +113,7 @@ apt-get update --quiet=2
 apt-get -y install      \
     git                 \
     tig                 \
+    bc                  \
     bash-completion     \
     bsdmainutils        \
     unattended-upgrades \