diff --git a/coreutils/chgrp.c b/coreutils/chgrp.c
index 8c969d7b6..93e493869 100644
--- a/coreutils/chgrp.c
+++ b/coreutils/chgrp.c
@@ -48,7 +48,6 @@ int chgrp_main(int argc, char **argv)
 	long gid;
 	int recursiveFlag;
 	int retval = EXIT_SUCCESS;
-	char *p;
 
 	recursiveFlag = bb_getopt_ulflags(argc, argv, "R");
 
diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c
index 017d5bf19..52dc11a28 100644
--- a/miscutils/hdparm.c
+++ b/miscutils/hdparm.c
@@ -48,7 +48,7 @@
 #include <asm/byteorder.h>
 
 
-#if __BYTE_ORDER == __BIG_ENDIAN
+#if (__BYTE_ORDER == __BIG_ENDIAN) && !defined(__USE_XOPEN)
 #define __USE_XOPEN
 #endif
 
diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index 70dcb24e9..8d156cc78 100644
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -33,12 +33,13 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <signal.h>
+
 #include "busybox.h"
 
 
 static const int RFC_868_BIAS = 2208988800UL;
 
-static void socket_timeout(void)
+static void socket_timeout(int sig)
 {
 	bb_error_msg_and_die("timeout connecting to time server");
 }