diff --git a/src/vs/workbench/parts/terminal/electron-browser/terminalTab.ts b/src/vs/workbench/parts/terminal/electron-browser/terminalTab.ts
index 99852a131ce..ab95836ed10 100644
--- a/src/vs/workbench/parts/terminal/electron-browser/terminalTab.ts
+++ b/src/vs/workbench/parts/terminal/electron-browser/terminalTab.ts
@@ -98,6 +98,7 @@ class SplitPaneContainer {
 		for (let i = 0; i < this._splitView.length - 1; i++) {
 			this._splitView.resizeView(i, sizes[i]);
 		}
+		this._isManuallySized = true;
 	}
 
 	private _addChild(size: number, instance: ITerminalInstance, index: number): void {