diff --git a/src/llama-hparams.h b/src/llama-hparams.h
index 556c8a056f..dd49d9bfc4 100644
--- a/src/llama-hparams.h
+++ b/src/llama-hparams.h
@@ -120,14 +120,12 @@ struct llama_hparams {
 
     uint32_t attn_head_dim            = 0;
     bool     mamba_rms_norm           = false;
-    double rope_theta               = 10000.0;
     uint32_t vocab_size               = 0;
     uint32_t intermediate_size        = 0;
-    float    mamba_expand             = 0.0f;
+    float     mamba_expand             = 0.0f;
     bool     ssm_rms_norm   = false;
     bool     ssm_conv_bias  = false;
     bool     ssm_proj_bias  = false;
-    uint32_t chunk_size     = 0;
 
     // for hybrid state space models
     std::array<bool, LLAMA_MAX_LAYERS> recurrent_layer_arr;