diff --git a/ShellCheck/Analyzer.hs b/ShellCheck/Analyzer.hs
index 968c0fc..6350a00 100644
--- a/ShellCheck/Analyzer.hs
+++ b/ShellCheck/Analyzer.hs
@@ -23,6 +23,7 @@ import ShellCheck.Analytics
 import ShellCheck.AnalyzerLib
 import ShellCheck.Interface
 import Data.List
+import Data.Monoid
 import qualified ShellCheck.Checks.Commands
 import qualified ShellCheck.Checks.ShellSupport