diff --git a/plugins/channel/nfm/nfmdemod.cpp b/plugins/channel/nfm/nfmdemod.cpp
index 26fc113ae..e17506916 100644
--- a/plugins/channel/nfm/nfmdemod.cpp
+++ b/plugins/channel/nfm/nfmdemod.cpp
@@ -26,7 +26,7 @@
 #include "dsp/pidcontroller.h"
 #include "dsp/dspengine.h"
 
-static const Real afSqTones[2] = {1200.0, 8000.0}; // {1200.0, 8000.0};
+static const Real afSqTones[2] = {1200.0, 6400.0}; // {1200.0, 8000.0};
 
 MESSAGE_CLASS_DEFINITION(NFMDemod::MsgConfigureNFMDemod, Message)