diff --git a/examples/C/gpio/gpio.c b/examples/C/gpio/gpio.c
index 8d303a797..e2af967e2 100644
--- a/examples/C/gpio/gpio.c
+++ b/examples/C/gpio/gpio.c
@@ -4,7 +4,7 @@
 
 // General-Purpose I/O (GPIO) example program illustrating compiled C code
 // compile with make
-// simulate with: wsim rv64gc --elf hello.elf --sim verilator
+// simulate with: wsim rv64gc --elf gpio --sim verilator
 
 #include <stdio.h>  
 #include "gpiolib.h"