diff --git a/coastlines/continental.py b/coastlines/continental.py
index 63c827c..f6a9757 100644
--- a/coastlines/continental.py
+++ b/coastlines/continental.py
@@ -48,7 +48,7 @@ def wms_fields(gdf):
             wms_conf=gdf.se_time * 1.96,
             wms_grew=gdf.rate_time < 0,
             wms_retr=gdf.rate_time > 0,
-            wms_sig=gdf.sig_time <= 0,
+            wms_sig=gdf.sig_time <= 0.01,
         )
     )