diff --git a/CHANGELOG.md b/CHANGELOG.md
index d43a0eece..a70b196f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 ### Improvements
 - Harden the nd2 source to allow it to read more files ([#1207](../../pull/1207))
 - Add ipyleaflet representation for JupyterLab ([#1065](../../pull/1065))
+- When restyling a source, share band range calculations ([#1215](../../pull/1215))
 
 ### Changes
 - Change how extensions and fallback priorities in Girder interact ([#1208](../../pull/1208))
diff --git a/large_image/tilesource/base.py b/large_image/tilesource/base.py
index d0b3ae73c..0a80f0cdb 100644
--- a/large_image/tilesource/base.py
+++ b/large_image/tilesource/base.py
@@ -193,7 +193,8 @@ def _setStyle(self, style):
                 delattr(self, key)
             except Exception:
                 pass
-        self._bandRanges = {}
+        if not hasattr(self, '_bandRanges'):
+            self._bandRanges = {}
         self._jsonstyle = style
         if style is not None:
             if isinstance(style, dict):