diff --git a/tools/resampler_tools/fir.cpp b/tools/resampler_tools/fir.cpp
index 14707d1..acd9911 100644
--- a/tools/resampler_tools/fir.cpp
+++ b/tools/resampler_tools/fir.cpp
@@ -84,7 +84,7 @@
     unsigned int polyN = 147;
     bool debug = false;
     double Fs = 48000;
-    double Fc = 24000;
+    double Fc = 20478;
     double atten = 1;
     int format = 0;