diff --git a/src/boomer.nim b/src/boomer.nim
index a30fb11..296a709 100644
--- a/src/boomer.nim
+++ b/src/boomer.nim
@@ -209,7 +209,7 @@ proc main() =
         body
         i += 1
 
-      template asOptionalParam(paramVar: untyped, body: untyped) =
+      template asOptionalParam(paramVar: untyped, body: untyped) {. warning[UnreachableCode]:off.} =
         let paramVar = block:
           var resultVal = none(string)
           if i + 1 <= paramCount():
@@ -329,8 +329,8 @@ proc main() =
 
   discard XMapWindow(display, win)
 
-  var wmName = "boomer"
-  var wmClass = "Boomer"
+  var wmName: cstring = "boomer"
+  var wmClass: cstring = "Boomer"
   var hints = XClassHint(res_name: wmName, res_class: wmClass)
 
   discard XStoreName(display, win, wmName)