diff --git a/cpukit/libnetworking/libc/getnetnamadr.c b/cpukit/libnetworking/libc/getnetnamadr.c
index 736444fc14..eb98477096 100644
--- a/cpukit/libnetworking/libc/getnetnamadr.c
+++ b/cpukit/libnetworking/libc/getnetnamadr.c
@@ -36,6 +36,9 @@
 #include <ctype.h>
 #include <errno.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h> /* for strcasecmp */
+#endif
 
 #ifndef _PATH_NETCONF
 #define _PATH_NETCONF	"/etc/host.conf"
diff --git a/cpukit/librpc/src/rpc/svc.c b/cpukit/librpc/src/rpc/svc.c
index 759931e258..9cc5cf3871 100644
--- a/cpukit/librpc/src/rpc/svc.c
+++ b/cpukit/librpc/src/rpc/svc.c
@@ -48,6 +48,9 @@ static char *rcsid = "$FreeBSD: src/lib/libc/rpc/svc.c,v 1.14 1999/08/28 00:00:4
 #endif
 
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h> /* for ffs */
+#endif
 #include <stdlib.h>
 #include <sys/errno.h>
 #include <rpc/rpc.h>