diff --git a/common/Drawings/Format/ChartFormat.js b/common/Drawings/Format/ChartFormat.js
index eff0247f2f..b8732c4102 100644
--- a/common/Drawings/Format/ChartFormat.js
+++ b/common/Drawings/Format/ChartFormat.js
@@ -2329,6 +2329,13 @@
     CBaseChartObject.prototype.isObjectInSmartArt = function() {
         return false;
     };
+    CBaseChartObject.prototype.getParentObjects = function() {
+        let oChartSpace = this.getChartSpace();
+        if(oChartSpace) {
+            return oChartSpace.getParentObjects();
+        }
+        return null;
+    };
 
     function getMinMaxFromArrPoints(aPoints) {
         if(Array.isArray(aPoints) && aPoints.length > 0) {
@@ -4409,6 +4416,12 @@
 	CSeriesBase.prototype.checkSeriesAfterChangeType = function() {
 
 	};
+    CSeriesBase.prototype.recalculateTrendline = function() {
+        let oTrendline = this.trendline;
+        if(oTrendline) {
+            oTrendline.recalculate();
+        }
+    };
     CSeriesBase.prototype.asc_getName = function() {
         var oThis = this;
         return AscFormat.ExecuteNoHistory(function() {
@@ -14115,6 +14128,16 @@
         }
         this.applyStyleEntry(oChartStyle.trendline, oColors.generateColors(1), 0, bReset);
     };
+    CTrendLine.prototype.recalculate = function() {
+        this.pen = null;
+        if(this.spPr && this.spPr.ln && this.spPr.ln.Fill) {
+            let oChartSpace = this.getChartSpace();
+            if(oChartSpace) {
+                this.pen = this.spPr.ln.createDuplicate();
+                this.pen.Fill.check(oChartSpace.Get_Theme(), oChartSpace.Get_ColorMap())
+            }
+        }
+    };
 
     function CUpDownBars() {
         CBaseChartObject.call(this);
diff --git a/common/Drawings/Format/ChartSpace.js b/common/Drawings/Format/ChartSpace.js
index c332e75352..fcdc5c8223 100644
--- a/common/Drawings/Format/ChartSpace.js
+++ b/common/Drawings/Format/ChartSpace.js
@@ -7098,7 +7098,7 @@ function(window, undefined) {
 						var ser = series[ii];
 						var pts = ser.getNumPts();
 						this.ptsCount += pts.length;
-
+						ser.recalculateTrendline();
 						ser.compiledSeriesBrush = new AscFormat.CUniFill();
 						ser.compiledSeriesBrush.merge(base_fills2[ser.idx]);
 						if (ser.spPr && ser.spPr.Fill) {
@@ -7368,6 +7368,7 @@ function(window, undefined) {
 						for(var i = 0; i < series.length; ++i) {
 							var default_line = parents.theme.themeElements.fmtScheme.lnStyleLst[0];
 							var ser = series[i];
+							ser.recalculateTrendline();
 							var pts = ser.getNumPts();
 							this.ptsCount += pts.length;
 							if(oChart.scatterStyle === AscFormat.SCATTER_STYLE_SMOOTH || oChart.scatterStyle === AscFormat.SCATTER_STYLE_SMOOTH_MARKER) {
@@ -7529,6 +7530,7 @@ function(window, undefined) {
 							base_line_fills = getArrayFillsFromBase(style.line2, nMaxSeriesIdx);
 						for(var i = 0; i < series.length; ++i) {
 							var ser = series[i];
+							ser.recalculateTrendline();
 							var compiled_brush = new AscFormat.CUniFill();
 							compiled_brush.merge(base_fills[ser.idx]);
 							if(ser.spPr && ser.spPr.Fill) {