diff --git a/devtools/client/inspector/inspector.js b/devtools/client/inspector/inspector.js
index 426183284d05..b4a7182d3eec 100644
--- a/devtools/client/inspector/inspector.js
+++ b/devtools/client/inspector/inspector.js
@@ -48,7 +48,7 @@ const INITIAL_SIDEBAR_SIZE = 350;
 
 // If the toolbox width is smaller than given amount of pixels,
 // the sidebar automatically switches from 'landscape' to 'portrait' mode.
-const PORTRAIT_MODE_WIDTH = 800;
+const PORTRAIT_MODE_WIDTH = 700;
 
 const SHOW_SPLIT_SIDEBAR_TOGGLE_PREF = "devtools.inspector.split-sidebar-toggle";
 const SPLIT_RULE_VIEW_PREF = "devtools.inspector.split-rule-enabled";