diff --git a/src/compile/mark/encode/offset.ts b/src/compile/mark/encode/offset.ts
index 5888345445d..1153a3e282c 100644
--- a/src/compile/mark/encode/offset.ts
+++ b/src/compile/mark/encode/offset.ts
@@ -57,7 +57,7 @@ export function positionOffset({
   }
 
   const markDefOffsetValue = markDef[channel];
-  if (markDefOffsetValue) {
+  if (markDefOffsetValue !== undefined) {
     return {offsetType: 'visual', offset: markDefOffsetValue};
   }
 
diff --git a/src/compile/mark/encode/position-rect.ts b/src/compile/mark/encode/position-rect.ts
index 59f4899e9e6..c33ff4f574f 100644
--- a/src/compile/mark/encode/position-rect.ts
+++ b/src/compile/mark/encode/position-rect.ts
@@ -302,6 +302,7 @@ function rectBinPosition({
   const vgChannel2 = getVgPositionChannel(channel2);
 
   const {offset} = positionOffset({channel, markDef, encoding, model, bandPosition: 0});
+  const {offset: offset2} = positionOffset({channel: channel2, markDef, encoding, model, bandPosition: 0});
 
   const bandPosition = isSignalRef(bandSize)
     ? {signal: `(1-${bandSize.signal})/2`}
@@ -315,7 +316,7 @@ function rectBinPosition({
         fieldDef,
         scaleName,
         bandPosition,
-        offset: getBinSpacing(channel2, spacing, reverse, axisTranslate, offset)
+        offset: getBinSpacing(channel2, spacing, reverse, axisTranslate, offset2 ?? offset)
       }),
       [vgChannel]: rectBinRef({
         fieldDef,