diff --git a/lib/barr/blocks/mem.rb b/lib/barr/blocks/mem.rb
index 4b9eb00..3774659 100644
--- a/lib/barr/blocks/mem.rb
+++ b/lib/barr/blocks/mem.rb
@@ -10,7 +10,7 @@ def update!
       private
 
       def sys_cmd
-        `free -h | grep 'cache:' | awk '{printf "%s / %sG", $(NF-1), $(NF-1)+$(NF)}'`.chomp
+        `free -h | grep 'Mem:' | awk '{printf "%s / %sG", $(NF-1), $(NF-1)+$(NF)}'`.chomp
       end
     end
   end