diff --git a/HackRF-One.md b/HackRF-One.md
index cb60f0d..e1d51f0 100644
--- a/HackRF-One.md
+++ b/HackRF-One.md
@@ -84,7 +84,7 @@ The CLKIN port on HackRF One is a high impedance input that expects a 0 V to 3 V
 
 HackRF One uses CLKIN instead of the internal crystal when a clock signal is detected on CLKIN.  The switch to or from CLKIN only happens when a transmit or receive operation begins.
 
-To verify that a signal has been detected on CLKIN, use `hackrf_si5351c -n 0 -r`.  The expected output with a clock detected is `[  0] -> 0x01`.  The expected output with no clock detected is `[  0] -> 0x51`.
+To verify that a signal has been detected on CLKIN, use `hackrf_debug --si5351c -n 0 -r`.  The expected output with a clock detected is `[  0] -> 0x01`.  The expected output with no clock detected is `[  0] -> 0x51`.
 
 ## Hardware Documentation