diff --git a/src/common/messages.d b/src/common/messages.d
index 3287758..abee795 100644
--- a/src/common/messages.d
+++ b/src/common/messages.d
@@ -165,16 +165,6 @@ struct AutocompleteResponse
 	 * Symbol identifier
 	 */
 	ulong symbolIdentifier;
-
-	/**
-	 * Creates an empty acknowledgement response
-	 */
-	static AutocompleteResponse ack()
-	{
-		AutocompleteResponse response;
-		response.completionType = "ack";
-		return response;
-	}
 }
 
 /**
diff --git a/src/server/main.d b/src/server/main.d
index 2095957..6c9be84 100644
--- a/src/server/main.d
+++ b/src/server/main.d
@@ -381,4 +381,4 @@ options:
     --socketFile FILENAME
         Use the given FILENAME as the path to the UNIX domain socket. Using
         this switch is an error on Windows.`, programName);
-}
\ No newline at end of file
+}
diff --git a/src/server/server.d b/src/server/server.d
index 69bd51f..b01d28f 100644
--- a/src/server/server.d
+++ b/src/server/server.d
@@ -70,8 +70,8 @@ string getConfigurationLocation()
  */
 void warnAboutOldConfigLocation()
 {
-	const configPath = "~/.config/dcd".expandTilde;
-	version (linux) if (configPath.exists && configPath.isFile)
+	version (linux) if ("~/.config/dcd".expandTilde().exists()
+		&& "~/.config/dcd".expandTilde().isFile())
 	{
 		warning("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
 		warning("!! Upgrade warning:");