diff --git a/acinclude.m4 b/acinclude.m4
index ff01db48b2..6ed38edb35 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1250,6 +1250,7 @@ AC_CHECK_HEADERS([ \
 		   sys/statfs.h \
 		   sys/statvfs.h \
 		   sys/socket.h \
+		   sys/sysctl.h \
 		   sys/time.h \
 		   sys/types.h \
 		   sys/un.h \
@@ -1341,6 +1342,8 @@ AC_CHECK_FUNCS([ \
 	sigaction \
 	strcasestr \
 	strerror \
+	sysconf \
+	sysctl \
 	timegm \
 ])
 
@@ -1352,7 +1355,6 @@ dnl haven't found a need for yet, and so haven't imported
 AC_CHECK_FUNCS([ \
 	chown \
 	fchown \
-	getdtablesize \
 	gethostname \
 	gettimeofday \
 	localtime_r \
@@ -1385,6 +1387,7 @@ AC_REPLACE_FUNCS([ \
 	erealloc \
 	err \
 	errx \
+	getdtablesize \
 	getopt \
 	getprogname \
 	mkstemp \
diff --git a/src/util/hputil.c b/src/util/hputil.c
index 3e9ae038e7..0613e4e27c 100644
--- a/src/util/hputil.c
+++ b/src/util/hputil.c
@@ -29,24 +29,6 @@ utimes(char *file, struct timeval tvp[2])
 }
 #endif
 
-int
-random(void)
-{
-    return rand();
-}
-
-void
-srandom(int seed)
-{
-    srand(seed);
-}
-
-int
-getdtablesize(void)
-{
-    return (20);
-}
-
 void
 setlinebuf(FILE * file)
 {