diff --git a/server/text_generation_server/layers/attention/flashinfer.py b/server/text_generation_server/layers/attention/flashinfer.py
index 5f8954ea..d603c6f5 100644
--- a/server/text_generation_server/layers/attention/flashinfer.py
+++ b/server/text_generation_server/layers/attention/flashinfer.py
@@ -50,7 +50,8 @@ def use_prefill_with_paged_kv_state(
     num_kv_heads: int,
     head_size: int,
     page_size: int,
-    query_dtype: str = "float16",
+    dtype: torch.dtype,
+    window_left: int,
 ):
     """
     Context manager to set the active flashinfer prefill state to the given
@@ -90,8 +91,9 @@ def use_prefill_with_paged_kv_state(
             num_qo_heads=num_heads,
             num_kv_heads=num_kv_heads,
             head_dim=head_size,
-            q_data_type=query_dtype,
+            q_data_type=dtype,
             page_size=page_size,
+            window_left=window_left,
         )
         yield
     finally:
@@ -119,7 +121,8 @@ def use_prefill_state(
     num_heads: int,
     num_kv_heads: int,
     head_size: int,
-    query_dtype: str = "float16",
+    dtype: torch.dtype,
+    window_left: int,
 ):
     """
     Context manager to set the active flashinfer prefill state to the given
@@ -135,7 +138,8 @@ def use_prefill_state(
             num_qo_heads=num_heads,
             num_kv_heads=num_kv_heads,
             head_dim=head_size,
-            q_data_type=query_dtype,
+            q_data_type=dtype,
+            window_left=window_left,
         )
         yield
     finally:
@@ -200,7 +204,8 @@ def use_decode_state(
     num_kv_heads: int,
     head_size: int,
     page_size: int,
-    query_dtype: str = "float16",
+    dtype: torch.dtype,
+    window_left: int,
 ):
     """
     Context manager to set the active flashinfer decoding state to the given
@@ -235,7 +240,9 @@ def use_decode_state(
             num_kv_heads=num_kv_heads,
             head_dim=head_size,
             page_size=page_size,
-            q_data_type=query_dtype,
+            data_type=dtype,
+            q_data_type=dtype,
+            window_left=window_left,
         )
         yield
     finally:
diff --git a/server/text_generation_server/models/flash_causal_lm.py b/server/text_generation_server/models/flash_causal_lm.py
index a2834962..57582ebc 100644
--- a/server/text_generation_server/models/flash_causal_lm.py
+++ b/server/text_generation_server/models/flash_causal_lm.py
@@ -1960,6 +1960,8 @@ class FlashCausalLM(Model):
                 num_kv_heads=self.num_kv_heads,
                 head_size=self.head_size,
                 page_size=BLOCK_SIZE,
+                dtype=self.dtype,
+                window_left=self.sliding_window,
             )
         else:
             assert input_lengths_tensor is not None
@@ -1971,6 +1973,8 @@ class FlashCausalLM(Model):
                 num_kv_heads=self.num_kv_heads,
                 head_size=self.head_size,
                 page_size=BLOCK_SIZE,
+                dtype=self.dtype,
+                window_left=self.sliding_window,
             )