diff --git a/core/renderers/common/info.js b/core/renderers/common/info.js
index 9a35bcb70..460cee391 100644
--- a/core/renderers/common/info.js
+++ b/core/renderers/common/info.js
@@ -754,6 +754,13 @@ Blockly.blockRendering.RenderInfo.prototype.finalize_ = function() {
         Math.max(widestRowWithConnectedBlocks, row.widthWithConnectedBlocks);
     this.recordElemPositions_(row);
   }
+  if (this.outputConnection && this.block_.nextConnection &&
+      this.block_.nextConnection.isConnected()) {
+    // Include width of connected block in value to stack width measurement.
+    widestRowWithConnectedBlocks =
+        Math.max(widestRowWithConnectedBlocks,
+            this.block_.nextConnection.targetBlock().getHeightWidth().width);
+  }
 
   this.widthWithChildren = Math.max(this.widthWithChildren,
       widestRowWithConnectedBlocks + this.startX);
diff --git a/core/renderers/geras/info.js b/core/renderers/geras/info.js
index f0b2dcb25..00b85b35f 100644
--- a/core/renderers/geras/info.js
+++ b/core/renderers/geras/info.js
@@ -403,6 +403,15 @@ Blockly.geras.RenderInfo.prototype.finalize_ = function() {
     }
     this.recordElemPositions_(row);
   }
+  if (this.outputConnection && this.block_.nextConnection &&
+      this.block_.nextConnection.isConnected()) {
+    // Include width of connected block in value to stack width measurement.
+    widestRowWithConnectedBlocks =
+        Math.max(widestRowWithConnectedBlocks,
+            this.block_.nextConnection.targetBlock().getHeightWidth().width -
+            this.constants_.DARK_PATH_OFFSET);
+  }
+
   this.bottomRow.baseline = yCursor - this.bottomRow.descenderHeight;
 
   // The dark (lowlight) adds to the size of the block in both x and y.
diff --git a/core/renderers/thrasos/info.js b/core/renderers/thrasos/info.js
index 6484d86ee..9589ef27f 100644
--- a/core/renderers/thrasos/info.js
+++ b/core/renderers/thrasos/info.js
@@ -329,6 +329,13 @@ Blockly.thrasos.RenderInfo.prototype.finalize_ = function() {
     }
     this.recordElemPositions_(row);
   }
+  if (this.outputConnection && this.block_.nextConnection &&
+      this.block_.nextConnection.isConnected()) {
+    // Include width of connected block in value to stack width measurement.
+    widestRowWithConnectedBlocks =
+        Math.max(widestRowWithConnectedBlocks,
+            this.block_.nextConnection.targetBlock().getHeightWidth().width);
+  }
 
   this.bottomRow.baseline = yCursor - this.bottomRow.descenderHeight;
   this.widthWithChildren = widestRowWithConnectedBlocks + this.startX;