diff --git a/nx/lib/nx/defn/expr.ex b/nx/lib/nx/defn/expr.ex
index cd8ee26c3c..33c3cb8831 100644
--- a/nx/lib/nx/defn/expr.ex
+++ b/nx/lib/nx/defn/expr.ex
@@ -356,7 +356,7 @@ defmodule Nx.Defn.Expr do
         tuple when is_tuple(tuple) ->
           raise ArgumentError,
                 "defn functions expects either numbers or tensors as arguments. " <>
-                  "If you want to pass a tuple, you must explicitly pattern match on the tuple in the signature" <>
+                  "If you want to pass a tuple, you must explicitly pattern match on the tuple in the signature " <>
                   "Got: #{inspect(tuple)}"
 
         other ->