diff --git a/lib/libc/string/strdup.c b/lib/libc/string/strdup.c
index 6fa50ceecff9..a1c2eedaf891 100644
--- a/lib/libc/string/strdup.c
+++ b/lib/libc/string/strdup.c
@@ -35,8 +35,6 @@
 static char sccsid[] = "@(#)strdup.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 
-#include <sys/types.h>
-
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
@@ -49,8 +47,8 @@ strdup(str)
 	char *copy;
 
 	len = strlen(str) + 1;
-	if (!(copy = malloc((u_int)len)))
+	if ((copy = malloc(len)) == NULL)
 		return (NULL);
-	bcopy(str, copy, len);
+	memcpy(copy, str, len);
 	return (copy);
 }