diff --git a/algorithms/deutsch_jozsa/deutsch_jozsa.ipynb b/algorithms/deutsch_jozsa/deutsch_jozsa.ipynb
index 46fc9aad..c0e910d6 100644
--- a/algorithms/deutsch_jozsa/deutsch_jozsa.ipynb
+++ b/algorithms/deutsch_jozsa/deutsch_jozsa.ipynb
@@ -109,7 +109,7 @@
     "\n",
     "\n",
     "@qfunc\n",
-    "def prep_minus(out: Output[QBit]) -> None:\n",
+    "def prep_minus(out: Output[QBit]) -> None\n",
     "    allocate(1, out)\n",
     "    X(out)\n",
     "    H(out)\n",