diff --git a/ggml-cuda.cu b/ggml-cuda.cu
index e7c9dee45..1ca071d90 100644
--- a/ggml-cuda.cu
+++ b/ggml-cuda.cu
@@ -6815,6 +6815,7 @@ static void ggml_cuda_op_get_rows(
             break;
         default:
             // TODO: k-quants
+            fprintf(stderr, "%s: unsupported type: %s\n", __func__, ggml_type_name(src0->type));
             GGML_ASSERT(false);
             break;
     }