diff --git a/src/compile/data/filterinvalid.ts b/src/compile/data/filterinvalid.ts
index 5126ea8dd8..b94cc8e253 100644
--- a/src/compile/data/filterinvalid.ts
+++ b/src/compile/data/filterinvalid.ts
@@ -75,10 +75,9 @@ export class FilterInvalidNode extends DataFlowNode {
 
       if (fieldDef !== null) {
         if (fieldDef.type === 'temporal') {
-          vegaFilters.push(`(isDate(${ref}) || (isValid(${ref}) && isFinite(+${ref})))`);
+          vegaFilters.push(`(isDate(${ref}) || (${isValidFiniteNumberExpr(ref)})`);
         } else if (fieldDef.type === 'quantitative') {
-          vegaFilters.push(`isValid(${ref})`);
-          vegaFilters.push(`isFinite(+${ref})`);
+          vegaFilters.push(isValidFiniteNumberExpr(ref));
         } else {
           // should never get here
         }
@@ -94,3 +93,7 @@ export class FilterInvalidNode extends DataFlowNode {
       : null;
   }
 }
+
+export function isValidFiniteNumberExpr(ref: string) {
+  return `isValid(${ref}) && isFinite(+${ref})`;
+}
diff --git a/src/compile/data/stack.ts b/src/compile/data/stack.ts
index 553bba2279..4bf33ba9c3 100644
--- a/src/compile/data/stack.ts
+++ b/src/compile/data/stack.ts
@@ -8,6 +8,7 @@ import {duplicate, getFirstDefined, hash} from '../../util';
 import {sortParams} from '../common';
 import {UnitModel} from '../unit';
 import {DataFlowNode} from './dataflow';
+import {isValidFiniteNumberExpr} from './filterinvalid';
 
 function getStackByFields(model: UnitModel): string[] {
   return model.stack.stackBy.reduce((fields, by) => {
@@ -240,7 +241,7 @@ export class StackNode extends DataFlowNode {
           const binEnd = vgField(dimensionFieldDef, {expr: 'datum', binSuffix: 'end'});
           transform.push({
             type: 'formula',
-            expr: `${bandPosition}*${binStart}+${1 - bandPosition}*${binEnd}`,
+            expr: `${isValidFiniteNumberExpr(binStart)} ? ${bandPosition}*${binStart}+${1 - bandPosition}*${binEnd} : ${binStart}`,
             as: vgField(dimensionFieldDef, {binSuffix: 'mid', forAs: true})
           });
         }
diff --git a/test/compile/data/stack.test.ts b/test/compile/data/stack.test.ts
index 11d0d1f04e..e5f0a1f30d 100644
--- a/test/compile/data/stack.test.ts
+++ b/test/compile/data/stack.test.ts
@@ -202,7 +202,7 @@ describe('compile/data/stack', () => {
       expect(assemble(model)).toEqual([
         {
           type: 'formula',
-          expr: '0.5*datum["bin_maxbins_10_b"]+0.5*datum["bin_maxbins_10_b_end"]',
+          expr: 'isValid(datum["bin_maxbins_10_b"]) && isFinite(+datum["bin_maxbins_10_b"]) ? 0.5*datum["bin_maxbins_10_b"]+0.5*datum["bin_maxbins_10_b_end"] : datum["bin_maxbins_10_b"]',
           as: 'bin_maxbins_10_b_mid'
         },
         {