diff --git a/modules/hist/TPavePainter.mjs b/modules/hist/TPavePainter.mjs
index 4dd85d8cf..589c67c8b 100644
--- a/modules/hist/TPavePainter.mjs
+++ b/modules/hist/TPavePainter.mjs
@@ -838,7 +838,7 @@ class TPavePainter extends ObjectPainter {
             is_th3 = isFunc(main.getDimension) && (main.getDimension() === 3),
             log = pad?.fLogv ?? (is_th3 ? false : pad?.fLogz),
             draw_palette = main._color_palette,
-            zaxis = main.getObject()?.fZaxis,
+            zaxis = isFunc(main.getZaxis) ? main.getZaxis() : main.getObject()?.fZaxis,
             sizek = pad?.fTickz ? 0.35 : 0.7;
 
       let zmin = 0, zmax = 100, gzmin, gzmax, axis_transform = '', axis_second = 0;
@@ -846,6 +846,7 @@ class TPavePainter extends ObjectPainter {
       this._palette_vertical = (palette.fX2NDC - palette.fX1NDC) < (palette.fY2NDC - palette.fY1NDC);
 
       axis.fTickSize = 0.6 * s_width / width; // adjust axis ticks size
+
       if ((typeof zaxis?.fLabelOffset !== 'undefined') && !is_th3) {
          axis.fTitle = zaxis.fTitle;
          axis.fTitleSize = zaxis.fTitleSize;
@@ -857,7 +858,8 @@ class TPavePainter extends ObjectPainter {
          axis.fLabelColor = zaxis.fLabelColor;
          axis.fLabelFont = zaxis.fLabelFont;
          axis.fLabelOffset = zaxis.fLabelOffset;
-         this.z_handle.setHistPainter(main, 'z');
+         if (!isFunc(main.getZaxis))
+            this.z_handle.setHistPainter(main, 'z');
          this.z_handle.source_axis = zaxis;
       }
 
diff --git a/modules/hist2d/TScatterPainter.mjs b/modules/hist2d/TScatterPainter.mjs
index 88845bc29..e1e72b395 100644
--- a/modules/hist2d/TScatterPainter.mjs
+++ b/modules/hist2d/TScatterPainter.mjs
@@ -42,17 +42,6 @@ class TScatterPainter extends TGraphPainter {
          gr.fFunctions.AddFirst(pal, '');
       }
 
-      const zaxis = this.getHistogram()?.fZaxis;
-      if (pal && zaxis) {
-         Object.assign(pal.fAxis, {
-            fTitle: zaxis.fTitle, fTitleSize: zaxis.fTitleSize,
-            fTitleOffset: zaxis.fTitleOffset, fTitleColor: zaxis.fTitleColor,
-            fLineColor: zaxis.fAxisColor, fTextSize: zaxis.fLabelSize,
-            fTextColor: zaxis.fLabelColor, fTextFont: zaxis.fLabelFont,
-            fLabelOffset: zaxis.fLabelOffset
-         });
-      }
-
       return pal;
    }
 
@@ -69,6 +58,12 @@ class TScatterPainter extends TGraphPainter {
       super._updateMembers(scatter.fGraph, obj.fGraph);
    }
 
+   /** @summary Return Z axis used for palette drawing
+    * @private */
+   getZaxis() {
+      return this.getHistogram()?.fZaxis;
+   }
+
    /** @summary Actual drawing of TScatter */
    async drawGraph() {
       const fpainter = this.get_main(),