diff --git a/packages/common/src/core/__tests__/slickGrid.spec.ts b/packages/common/src/core/__tests__/slickGrid.spec.ts
index ba9cc9f8c..4a2ece321 100644
--- a/packages/common/src/core/__tests__/slickGrid.spec.ts
+++ b/packages/common/src/core/__tests__/slickGrid.spec.ts
@@ -2844,7 +2844,7 @@ describe('SlickGrid core file', () => {
       grid.init();
       const result = grid.getHeadersWidth();
 
-      expect(result).toBe(DEFAULT_GRID_WIDTH + (1000 + 80 * 2) + 1000 + 1000); // Left + Right => 800 + (1000 + (defaultColumnWidth * 2)) * 2 + 1000
+      expect(result).toBe(DEFAULT_GRID_WIDTH + (1000 + 80) + 1000 + 1000); // Left(1 col) + Right(1 col) => 800 + (1000 + 80) + 1000 + 1000
     });
 
     it('should return viewport element when calling the function when found in the grid container', () => {
@@ -2856,7 +2856,7 @@ describe('SlickGrid core file', () => {
       grid.init();
       const result = grid.getHeadersWidth();
 
-      expect(result).toBe(DEFAULT_GRID_WIDTH + (1000 + 80 * 2) * 2 + 1000); // Left + Right => 800 + (1000 + (defaultColumnWidth * 2)) * 2 + 1000
+      expect(result).toBe(DEFAULT_GRID_WIDTH + (1000 + 80 * 2) + 1000 + 1000); // Both cols in left band => 800 + (1000 + 160) + 1000 + 1000
     });
 
     it('should remove Grid Menu width from the last header when scrollbar width is collapsed and columns are wider than canvas', () => {
diff --git a/packages/common/src/core/slickGrid.ts b/packages/common/src/core/slickGrid.ts
index 08048b00f..748017d03 100755
--- a/packages/common/src/core/slickGrid.ts
+++ b/packages/common/src/core/slickGrid.ts
@@ -1279,7 +1279,7 @@ export class SlickGrid<TData = any, C extends Column<TData> = Column<TData>, O e
 
     if (this.hasFrozenColumns()) {
       this.headersWidthL = this.headersWidthL + HEADER_WIDTH_SLACK;
-      this.headersWidthR = Math.max(this.headersWidthR, this.viewportW) + this.headersWidthL;
+      this.headersWidthR = Math.max(this.headersWidthR, this.viewportW) + HEADER_WIDTH_SLACK;
     } else {
       this.headersWidthL = Math.max(this.headersWidthL, this.viewportW) + HEADER_WIDTH_SLACK;
     }