diff --git a/vllm/model_executor/models/config.py b/vllm/model_executor/models/config.py
index 57411849e2be..4bd554497881 100644
--- a/vllm/model_executor/models/config.py
+++ b/vllm/model_executor/models/config.py
@@ -116,13 +116,6 @@ def verify_and_update_config(vllm_config: "VllmConfig") -> None:
         ):
             cache_config.cache_dtype = "fp8_e4m3"
             logger.info_once("Using fp8 kv-cache for GlmMoeDsaForCausalLM on SM10x")
-            spec_config = vllm_config.speculative_config
-            if (
-                spec_config is not None
-                and spec_config.method not in ("mtp", "dspark", "dflash")
-                and spec_config.kv_cache_dtype is None
-            ):
-                spec_config.kv_cache_dtype = "auto"
 
         # For Glm-Moe-DSA, qrep + a2a is better than the default all-gather + ag-rs
         # in most cases.