diff --git a/src/models/dflash.cpp b/src/models/dflash.cpp
index eb36336762..daaa20826a 100644
--- a/src/models/dflash.cpp
+++ b/src/models/dflash.cpp
@@ -14,11 +14,14 @@ void llama_model_dflash::load_arch_hparams(llama_model_loader & ml) {
 
     hparams.n_embd_inp_enc_impl = (uint32_t) target_layer_ids.size() * hparams.n_embd;
 
-    LLAMA_LOG_INFO("%s: DFlash extract_layers = [", __func__);
-    for (size_t i = 0; i < target_layer_ids.size(); ++i) {
-        LLAMA_LOG_INFO("%d%s", target_layer_ids[i], i + 1 < target_layer_ids.size() ? ", " : "");
+    std::string layers;
+    const char * sep = "";
+    for (const auto id : target_layer_ids) {
+        layers += sep;
+        layers += std::to_string(id);
+        sep = ", ";
     }
-    LLAMA_LOG_INFO("]\n");
+    LLAMA_LOG_INFO("%s: DFlash extract_layers = [%s]\n", __func__, layers.c_str());
 
     // DeepSeek-V4 DSpark backbone: stages are full DSV4 blocks, uniform sliding window (the draft KV ring)
     ml.get_key(LLM_KV_HYPER_CONNECTION_COUNT, hparams.dsv4_hc_mult, false);