diff --git a/gr-analog/lib/quadrature_demod_cf_impl.cc b/gr-analog/lib/quadrature_demod_cf_impl.cc
index 059cc89..4c29b1b 100644
--- a/gr-analog/lib/quadrature_demod_cf_impl.cc
+++ b/gr-analog/lib/quadrature_demod_cf_impl.cc
@@ -28,6 +28,7 @@
 #include <gnuradio/io_signature.h>
 #include <gnuradio/math.h>
 #include <volk/volk.h>
+#include <math.h>

 namespace gr {
   namespace analog {
@@ -67,7 +68,11 @@ namespace gr {
       std::vector<gr_complex> tmp(noutput_items);
       volk_32fc_x2_multiply_conjugate_32fc(&tmp[0], &in[1], &in[0], noutput_items);
       for(int i = 0; i < noutput_items; i++) {
-        out[i] = d_gain * gr::fast_atan2f(imag(tmp[i]), real(tmp[i]));
+       if((float)real(tmp[i]) != INFINITY && (float)imag(tmp[i]) != INFINITY && (float)real(tmp[i]) != -INFINITY && (float)imag(tmp[i]) != -INFINITY){
+               out[i] = d_gain * gr::fast_atan2f(imag(tmp[i]), real(tmp[i]));
+       }else{
+               out[i] = 0.0;
+       }
       }

       return noutput_items;