diff --git a/os2/usleep.c b/os2/usleep.c
index f0e8a2b..0947c1e 100644
--- a/os2/usleep.c
+++ b/os2/usleep.c
@@ -2,5 +2,5 @@
 #include <os2.h>
 void usleep (unsigned long usec)
 {
-	DosSleep(usec ? (usec/1000l) : 1l);
+	DosSleep((usec >= 1000)? (usec / 1000) : 1);
 }