diff --git a/sdrgui/mainspectrum/readme.md b/sdrgui/mainspectrum/readme.md
index 1f6bd3a8b..394f1eef9 100644
--- a/sdrgui/mainspectrum/readme.md
+++ b/sdrgui/mainspectrum/readme.md
@@ -22,7 +22,7 @@ The tooltip shows the device type, sequence number and serial number of the devi
 
 You may click on this area and drag the window with the mouse.
 
-<h3>3: Title</h3>
+<h3>2: Title</h3>
 
 The window title shows the device type and a sequence number for which the spectrum is displayed. It is the same as in the corresponding device window.