diff --git a/src/vs/workbench/contrib/chat/browser/agentSessions/media/agentsessionsviewer.css b/src/vs/workbench/contrib/chat/browser/agentSessions/media/agentsessionsviewer.css
index 190ef9eceb194..f2317fde5b7c8 100644
--- a/src/vs/workbench/contrib/chat/browser/agentSessions/media/agentsessionsviewer.css
+++ b/src/vs/workbench/contrib/chat/browser/agentSessions/media/agentsessionsviewer.css
@@ -161,6 +161,7 @@
 
 			.agent-session-diff-container {
 				display: flex;
+				flex-shrink: 0;
 				gap: 4px;
 
 				&:not(.has-diff) {