diff --git a/examples/adc/adc_main.c b/examples/adc/adc_main.c
index 16f180696..c64281385 100644
--- a/examples/adc/adc_main.c
+++ b/examples/adc/adc_main.c
@@ -252,9 +252,9 @@ int adc_main(int argc, char *argv[])
 
       printf("adc_main: Initializing external ADC device\n");
       ret = boardctl(BOARDIOC_ADCTEST_SETUP, 0);
-      if (ret != OK)
+      if (ret < 0)
         {
-          printf("adc_main: boardctl failed: %d\n", ret);
+          printf("adc_main: boardctl failed: %d\n", errno);
           errval = 1;
           goto errout;
         }
diff --git a/examples/pwm/pwm_main.c b/examples/pwm/pwm_main.c
index 844551550..84c78c329 100644
--- a/examples/pwm/pwm_main.c
+++ b/examples/pwm/pwm_main.c
@@ -317,7 +317,7 @@ int pwm_main(int argc, char *argv[])
   ret = boardctl(BOARDIOC_PWMTEST_SETUP, 0);
   if (ret != OK)
     {
-      printf("pwm_main: boardctl failed: %d\n", ret);
+      printf("pwm_main: boardctl failed: %d\n", errno);
       goto errout;
     }
 
diff --git a/examples/touchscreen/tc_main.c b/examples/touchscreen/tc_main.c
index 8e35630d2..74d08e790 100644
--- a/examples/touchscreen/tc_main.c
+++ b/examples/touchscreen/tc_main.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * examples/touchscreen/tc_main.c
  *
- *   Copyright (C) 2011, 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011, 2014-2025 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -134,7 +134,7 @@ int tc_main(int argc, char *argv[])
   ret = boardctl(BOARDIOC_TSCTEST_SETUP, CONFIG_EXAMPLES_TOUCHSCREEN_MINOR);
   if (ret != OK)
     {
-      printf("tc_main: board_tsc_setup failed: %d\n", ret);
+      printf("tc_main: board_tsc_setup failed: %d\n", errno);
       errval = 1;
       goto errout;
     }