diff --git a/TODO b/TODO
index 149e53e..2bc544c 100644
--- a/TODO
+++ b/TODO
@@ -27,6 +27,5 @@ Tools to be implemented
 Misc
 ====
 
- * Check all ioctl() calls for failure.
  * Decide what to do with 'bool vs int' debate.
  * Beautify passwd(1) + shadow support.
diff --git a/hwclock.c b/hwclock.c
index e26fd73..6014f08 100644
--- a/hwclock.c
+++ b/hwclock.c
@@ -76,7 +76,8 @@ readrtctm(struct tm *tm, int fd)
 	struct rtc_time rt;
 
 	memset(&rt, 0, sizeof(rt));
-	ioctl(fd, RTC_RD_TIME, &rt);
+	if (ioctl(fd, RTC_RD_TIME, &rt) < 0)
+		eprintf("RTC_RD_TIME:");
 	tm->tm_sec = rt.tm_sec;
 	tm->tm_min = rt.tm_min;
 	tm->tm_hour = rt.tm_hour;
@@ -102,7 +103,8 @@ writertctm(struct tm *tm, int fd)
 	rt.tm_wday = tm->tm_wday;
 	rt.tm_yday = tm->tm_yday;
 	rt.tm_isdst = tm->tm_isdst;
-	ioctl(fd, RTC_SET_TIME, &rt);
+	if (ioctl(fd, RTC_SET_TIME, &rt) < 0)
+		eprintf("RTC_SET_TIME:");
 }
 
 static void