diff --git a/src/columnHeatmap.js b/src/columnHeatmap.js
index 9faf9a4..9540c58 100644
--- a/src/columnHeatmap.js
+++ b/src/columnHeatmap.js
@@ -47,7 +47,7 @@
 
 
                     if (typeof settings.fn_parseValue == "function") {
-                        let value = fn_parseValue($(td).text());
+                        let value = settings.fn_parseValue($(td).text());
                         if (typeof value == "undefined") {
                             throw 'None value returned in fn_parseValue';
                         } else {
@@ -111,4 +111,4 @@
             return;
         }
     };
-}(jQuery));
\ No newline at end of file
+}(jQuery));