diff --git a/devices/surface/TOC.md b/devices/surface/TOC.md
index b72c5fe305..6c3f67896b 100644
--- a/devices/surface/TOC.md
+++ b/devices/surface/TOC.md
@@ -48,7 +48,7 @@
 ### [Unenroll Surface devices from SEMM](unenroll-surface-devices-from-semm.md)
 
 ## Support
-### [Fix common Surface problems using the Surface Diagnostic Toolkit for Business](surface-diagnostic-toolkit-for-business-intro)
+### [Fix common Surface problems using the Surface Diagnostic Toolkit for Business](surface-diagnostic-toolkit-for-business-intro.md)
 ### [Surface Diagnostic Toolkit for Business](surface-diagnostic-toolkit-business.md)
 ### [Use Surface Diagnostic Toolkit for Business in desktop mode](surface-diagnostic-toolkit-desktop-mode.md)
 ### [Run Surface Diagnostic Toolkit for Business using commands](surface-diagnostic-toolkit-command-line.md)