diff --git a/message.nim b/message.nim
index c9dc3a3..7782664 100644
--- a/message.nim
+++ b/message.nim
@@ -27,10 +27,11 @@ proc parseField[S, T](input: string, output: var array[S, T]) =
 
 proc parseField[T](input: string, output: var seq[T]) =
   let parts = input.split(",")
+  if parts.len < 1:
+    raise newException(ValueError, "Sequence is empty")
   output = newSeq[T](parts.len)
-  if parts.len > 0:
-    for i in 0 .. parts.len - 1:
-      parseField(parts[i], output[i])
+  for i in 0 .. parts.len - 1:
+    parseField(parts[i], output[i])
 
 proc parseField[T: tuple | object](input: string, output: var T) =
   var fieldCount = 0