diff --git a/lib/libc/gen/usleep.c b/lib/libc/gen/usleep.c
index 5141d363edf9..03df4953de52 100644
--- a/lib/libc/gen/usleep.c
+++ b/lib/libc/gen/usleep.c
@@ -36,21 +36,27 @@
 static char sccsid[] = "@(#)usleep.c	8.1 (Berkeley) 6/4/93";
 #endif
 static char rcsid[] =
-	"$Id$";
+	"$Id: usleep.c,v 1.19 1997/10/17 09:40:08 ache Exp $";
 #endif /* LIBC_SCCS and not lint */
 
+#include <errno.h>
 #include <time.h>
 #include <unistd.h>
 
-void
+int
 usleep(useconds)
 	unsigned int useconds;
 {
 	struct timespec time_to_sleep;
 
-	if (useconds) {
-		time_to_sleep.tv_nsec = (useconds % 1000000) * 1000;
-		time_to_sleep.tv_sec = useconds / 1000000;
-		(void)nanosleep(&time_to_sleep, NULL);
+	if (useconds >= 1000000) {
+		errno = EINVAL;
+		return -1;
 	}
+	if (useconds) {
+		time_to_sleep.tv_nsec = useconds * 1000;
+		time_to_sleep.tv_sec = 0;
+		return nanosleep(&time_to_sleep, NULL);
+	}
+	return 0;
 }