diff --git a/src/llama-model.cpp b/src/llama-model.cpp
index 58ca7df707..23a26f0c64 100644
--- a/src/llama-model.cpp
+++ b/src/llama-model.cpp
@@ -1095,6 +1095,7 @@ void llama_model::load_hparams(llama_model_loader & ml) {
                 ml.get_key(LLM_KV_ATTENTION_LAYERNORM_RMS_EPS, hparams.f_norm_rms_eps);
 
                 switch (hparams.n_layer) {
+                    case 18: type = LLM_TYPE_537M; break;
                     case 26: type = LLM_TYPE_1B; break;
                     case 34: type = LLM_TYPE_4B; break;
                     case 48: type = LLM_TYPE_12B; break;
diff --git a/src/llama-model.h b/src/llama-model.h
index 6fcd74d57f..46f7d0480f 100644
--- a/src/llama-model.h
+++ b/src/llama-model.h
@@ -39,6 +39,7 @@ enum llm_type {
     LLM_TYPE_410M,
     LLM_TYPE_450M,
     LLM_TYPE_475M,
+    LLM_TYPE_537M,
     LLM_TYPE_700M,
     LLM_TYPE_770M,
     LLM_TYPE_780M,