diff --git a/src/rtl_fm.c b/src/rtl_fm.c
index 77fbb9f..29ec51a 100644
--- a/src/rtl_fm.c
+++ b/src/rtl_fm.c
@@ -289,8 +289,8 @@ void usage(void)
 		"\t	direct: enable direct sampling (bypasses tuner, uses rtl2832 xtal)\n"
 		"\t	offset: enable offset tuning (only e4000 tuner)\n"
 		"\t[-O set RTL options string seperated with ':' ]\n"
-		"\t  f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
-		"\t  dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
+		"\t	f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
+		"\t	dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
 		"\t[-q dc_avg_factor for option rdc (default: 9)]\n"
 		"\t[-n disables demodulation output to stdout/file]\n"
 		"\tfilename ('-' means stdout)\n"
diff --git a/src/rtl_sdr.c b/src/rtl_sdr.c
index 5d24934..2390a07 100644
--- a/src/rtl_sdr.c
+++ b/src/rtl_sdr.c
@@ -55,8 +55,8 @@ void usage(void)
 		"\t[-g gain (default: 0 for auto)]\n"
 		"\t[-p ppm_error (default: 0)]\n"
 		"\t[-O set RTL options string seperated with ':' ]\n"
-		"\t  f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
-		"\t  dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
+		"\t	f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
+		"\t	dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
 		"\t[-b output_block_size (default: 16 * 16384)]\n"
 		"\t[-n number of samples to read (default: 0, infinite)]\n"
 		"\t[-S force sync output (default: async)]\n"
diff --git a/src/rtl_test.c b/src/rtl_test.c
index bf9d54a..bb583f6 100644
--- a/src/rtl_test.c
+++ b/src/rtl_test.c
@@ -92,8 +92,8 @@ void usage(void)
 		"\t[-s samplerate (default: 2048000 Hz)]\n"
 		"\t[-d device_index or serial (default: 0)]\n"
 		"\t[-O set RTL options string seperated with ':' ]\n"
-		"\t  f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
-		"\t  dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
+		"\t	f=<freqHz>:bw=<bw_in_kHz>:agc=<tuner_gain_mode>:gain=<tenth_dB>\n"
+		"\t	dagc=<rtl_agc>:ds=<direct_sampling_mode>:T=<bias_tee>\n"
 		"\t[-t enable Elonics E4000 tuner benchmark]\n"
 #ifndef _WIN32
 		"\t[-p[seconds] enable PPM error measurement (default: 10 seconds)]\n"