diff --git a/ggml-metal.metal b/ggml-metal.metal
index 9fdedeab4..c223a981c 100644
--- a/ggml-metal.metal
+++ b/ggml-metal.metal
@@ -4968,6 +4968,7 @@ void dequantize_iq1_s(device const block_iq1_s * xb, short il, thread type4x4 &
     }
 }
 
+template <typename type4x4>
 void dequantize_iq4_nl(device const block_iq4_nl * xb, short il, thread type4x4 & reg) {
     device const uint16_t * q4 = (device const uint16_t *)xb->qs;
     const float d = xb->d;