diff --git a/examples/mraa-gpio.c b/examples/mraa-gpio.c
index 93651c0..347d01b 100644
--- a/examples/mraa-gpio.c
+++ b/examples/mraa-gpio.c
@@ -98,7 +98,7 @@ gpio_set(int pin, int level, mraa_boolean_t raw)
         if (raw != 0) {
             if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
                 fprintf(stdout,
-                        "mmapped access to gpio not supported, falling back to normal mode\n", pin);
+                        "mmapped access to gpio %d not supported, falling back to normal mode\n", pin);
             }
         }
         mraa_gpio_write(gpio, level);