diff --git a/antenna-tuner.ino b/antenna-tuner.ino
index 6001ec9..9aacea5 100644
--- a/antenna-tuner.ino
+++ b/antenna-tuner.ino
@@ -39,7 +39,7 @@
 #include "src/Nvm/Nvm.h"
 #include "src/Led/Led.h"
 #include "src/Button/Button.h"
-#include "src/MathMf/MathMF.h"
+#include "src/MathMf/MathMf.h"
 
 
 //#define SERIAL_DEBUG              // activate debug printing over RS232