diff --git a/conf/gnss-sdr_multichannel_GPS_L1_USRP_X300_realtime.conf b/conf/gnss-sdr_multichannel_GPS_L1_USRP_X300_realtime.conf
index 85134032b..142c694dc 100644
--- a/conf/gnss-sdr_multichannel_GPS_L1_USRP_X300_realtime.conf
+++ b/conf/gnss-sdr_multichannel_GPS_L1_USRP_X300_realtime.conf
@@ -112,7 +112,7 @@ InputFilter0.dump_filename=../data/input_filter.dat
 ;#and the weight given to the error in those bands.
 
 ;#input_item_type: Type and resolution for input signal samples. Use only gr_complex in this version.
-InputFilter0.input_item_type=float
+InputFilter0.input_item_type=gr_complex
 
 ;#outut_item_type: Type and resolution for output filtered signal samples. Use only gr_complex in this version.
 InputFilter0.output_item_type=gr_complex
@@ -204,7 +204,7 @@ InputFilter1.dump_filename=../data/input_filter.dat
 ;#and the weight given to the error in those bands.
 
 ;#input_item_type: Type and resolution for input signal samples. Use only gr_complex in this version.
-InputFilter1.input_item_type=float
+InputFilter1.input_item_type=gr_complex
 
 ;#outut_item_type: Type and resolution for output filtered signal samples. Use only gr_complex in this version.
 InputFilter1.output_item_type=gr_complex