diff --git a/funasr/models/pooling/statistic_pooling.py b/funasr/models/pooling/statistic_pooling.py
index 97f8a24f5..8f85de99d 100644
--- a/funasr/models/pooling/statistic_pooling.py
+++ b/funasr/models/pooling/statistic_pooling.py
@@ -82,7 +82,7 @@ def windowed_statistic_pooling(
     tt = xs_pad.shape[2]
     num_chunk = int(math.ceil(tt / pooling_stride))
     pad = pooling_size // 2
-    if xs_pad.shape == 4:
+    if len(xs_pad.shape) == 4:
         features = F.pad(xs_pad, (0, 0, pad, pad), "reflect")
     else:
         features = F.pad(xs_pad, (pad, pad), "reflect")