diff --git a/Laser-Controller.md b/Laser-Controller.md
index 3ca3b4c..35cf662 100644
--- a/Laser-Controller.md
+++ b/Laser-Controller.md
@@ -29,7 +29,7 @@ The Pico laser controller understands the commands in the table below.  Any othe
 | *idn?                 | Return identification string               |
 | f.[x]                 | Set the center frequency to *x*.           |
 | f.?                   | Return the current center frequency.       |
-|                       | The center frequency = green freuquency.   |
+|                       | The center frequency = green frequency.   |
 |                       | Blue freq. is set to *x* - 3 Hz.           |
 |                       | Red freq. is set to *x* + 3 Hz.            |
 | [b/g/r].[**on**/off] | Turn the blue/green/red laser on/off.  |