diff --git a/python/sglang/srt/disaggregation/kv_events.py b/python/sglang/srt/disaggregation/kv_events.py
index b8048ee6b..d256a7e9f 100644
--- a/python/sglang/srt/disaggregation/kv_events.py
+++ b/python/sglang/srt/disaggregation/kv_events.py
@@ -56,7 +56,7 @@ class KVCacheEvent(
     """Base class for all KV cache-related events"""
 
 
-# Medium values for hicache storage tiers 
+# Medium values for hicache storage tiers
 MEDIUM_GPU = "GPU"
 MEDIUM_CPU = "CPU_PINNED"
 
diff --git a/python/sglang/srt/mem_cache/cache_init_params.py b/python/sglang/srt/mem_cache/cache_init_params.py
index 7b1b4a7d6..6de3f984f 100644
--- a/python/sglang/srt/mem_cache/cache_init_params.py
+++ b/python/sglang/srt/mem_cache/cache_init_params.py
@@ -33,3 +33,6 @@ class CacheInitParams:
     chunked_prefill_size: Optional[int] = None
 
     sliding_window_size: Optional[int] = None
+
+    # Time-to-live for cache entries in seconds. If None, TTL is disabled.
+    cache_ttl_seconds: Optional[float] = None