diff --git a/src/vs/base/browser/ui/splitview/panelview.css b/src/vs/base/browser/ui/splitview/panelview.css
index 6dfe2379b16..e4853977a88 100644
--- a/src/vs/base/browser/ui/splitview/panelview.css
+++ b/src/vs/base/browser/ui/splitview/panelview.css
@@ -83,4 +83,27 @@
 .monaco-panel-view .panel > .panel-body {
 	overflow: hidden;
 	flex: 1;
-}
\ No newline at end of file
+}
+
+/* Animation */
+
+.monaco-panel-view.animated .split-view-view {
+	transition-duration: 0.15s;
+	-webkit-transition-duration: 0.15s;
+	-moz-transition-duration: 0.15s;
+	transition-timing-function: ease-out;
+	-webkit-transition-timing-function: ease-out;
+	-moz-transition-timing-function: ease-out;
+}
+
+.monaco-panel-view.animated.vertical .split-view-view {
+	transition-property: height;
+	-webkit-transition-property: height;
+	-moz-transition-property: height;
+}
+
+.monaco-panel-view.animated.horizontal .split-view-view {
+	transition-property: width;
+	-webkit-transition-property: width;
+	-moz-transition-property: width;
+}