diff --git a/csdr.c b/csdr.c
index 01372cc..aea07b0 100644
--- a/csdr.c
+++ b/csdr.c
@@ -81,6 +81,8 @@ char usage[]=
 "    shift_addition_cc --fifo <fifo_path>\n"
 "    shift_addition_cc_test\n"
 "    shift_table_cc <rate> [table_size]\n"
+"    shift_addition_fc <rate>\n"
+"    shift_addition_fc --fifo <fifo_path>\n"
 "    decimating_shift_addition_cc <rate> [decimation]\n"
 "    dcblock_ff\n"
 "    fastdcblock_ff\n"
@@ -100,6 +102,7 @@ char usage[]=
 "    old_fractional_decimator_ff <decimation_rate> [transition_bw [window]]\n"
 "    fractional_decimator_ff <decimation_rate> [num_poly_points ( [transition_bw [window]] | --prefilter )]\n"
 "    fft_cc <fft_size> <out_of_every_n_samples> [window [--octave] [--benchmark]]\n"
+"    fft_fc <fft_size> <out_of_every_n_samples> [window [--benchmark]]\n"
 "    logpower_cf [add_db]\n"
 "    fft_benchmark <fft_size> <fft_cycles> [--benchmark]\n"
 "    bandpass_fir_fft_cc <low_cut> <high_cut> <transition_bw> [window]\n"