diff --git a/python/sglang/srt/mem_cache/deepseek_v4_memory_pool.py b/python/sglang/srt/mem_cache/deepseek_v4_memory_pool.py
index f7c5555dd43e..ba5818284e96 100644
--- a/python/sglang/srt/mem_cache/deepseek_v4_memory_pool.py
+++ b/python/sglang/srt/mem_cache/deepseek_v4_memory_pool.py
@@ -1867,6 +1867,7 @@ def get_low_ratio_index_k_dequant(
         self, layer_id: int, slots: Optional[torch.Tensor] = None
     ) -> torch.Tensor:
         """Index-K rows at `slots` from the layer's latent source."""
+        self.wait_layer_transfer(layer_id)
         compress_ratio, compress_layer_id, _ = self.layer_mapping[layer_id]
         return self._indexer_pool(compress_ratio).get_index_k_dequant(
             compress_layer_id, slots
@@ -1877,6 +1878,7 @@ def get_low_ratio_index_k_fp4(
     ) -> Tuple[torch.Tensor, torch.Tensor]:
         """Packed fp4 index-K rows at `slots`: (payload int8 [n, 64], ue8m0 scales
         packed int32 [n]), the input layout of quantize_fp4_indexer_tensor."""
+        self.wait_layer_transfer(layer_id)
         compress_ratio, compress_layer_id, _ = self.layer_mapping[layer_id]
         return self._indexer_pool(compress_ratio).get_index_k_fp4(
             compress_layer_id, slots
diff --git a/test/registered/unit/mem_cache/test_dsv4_compressed_pools.py b/test/registered/unit/mem_cache/test_dsv4_compressed_pools.py
index 06e677a28778..a83bb4baac17 100644
--- a/test/registered/unit/mem_cache/test_dsv4_compressed_pools.py
+++ b/test/registered/unit/mem_cache/test_dsv4_compressed_pools.py
@@ -205,12 +205,18 @@ def test_indexer_access_uses_layer_ratio_and_waits_only_for_reads(self):
         with patch.object(pool, "wait_layer_transfer") as wait:
             trace.attach_mock(wait, "wait")
             pool.get_index_k_fp4_payload_buffer(2)
+            pool.get_low_ratio_index_k_dequant(2, "slots")
+            pool.get_low_ratio_index_k_fp4(2, "slots")
             pool.set_index_k_fp4(2, "loc", "cache")
         self.assertEqual(
             trace.mock_calls,
             [
                 unittest.mock.call.wait(2),
                 unittest.mock.call.indexer.get_index_k_fp4_payload_buffer(1),
+                unittest.mock.call.wait(2),
+                unittest.mock.call.indexer.get_index_k_dequant(1, "slots"),
+                unittest.mock.call.wait(2),
+                unittest.mock.call.indexer.get_index_k_fp4(1, "slots"),
                 unittest.mock.call.indexer.set_index_fp4(1, "loc", "cache"),
             ],
         )