diff --git a/src/config.ts b/src/config.ts
index 6364e77b..a9763f1b 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -57,7 +57,7 @@ function replacement(name: string): string|undefined {
   if (name.startsWith(configPrefix)) {
     const config = vscode.workspace.getConfiguration().get(
         name.substr(configPrefix.length));
-    return (typeof config === 'string') ? config : undefined;
+    return (typeof config === 'string') ? substitute(config) : undefined;
   }
 
   return undefined;