diff --git a/UnixBench/src/big.c b/UnixBench/src/big.c
index 40aa87f..3e363c2 100644
--- a/UnixBench/src/big.c
+++ b/UnixBench/src/big.c
@@ -45,9 +45,6 @@
 #define MAXCHILD	12
 #define MAXWORK		10
 
-/* Can't seem to get this declared in the headers... */
-extern int kill(pid_t pid, int sig);
-
 void	wrapup(const char *);
 void	onalarm(int);
 void	pipeerr();
diff --git a/UnixBench/src/dhry_1.c b/UnixBench/src/dhry_1.c
index 99c8469..673481f 100644
--- a/UnixBench/src/dhry_1.c
+++ b/UnixBench/src/dhry_1.c
@@ -74,15 +74,13 @@ Enumeration     Func_1 ();
 /* variables for time measurement: */
 
 #ifdef TIMES
-struct tms      time_info;
-extern  int     times ();
-                /* see library function "times" */
+#include <time.h>
+#include <sys/times.h>
 #define Too_Small_Time 120
                 /* Measurements should last at least about 2 seconds */
 #endif
 #ifdef TIME
-extern long     time();
-                /* see library function "time"  */
+#include <time.h>
 #define Too_Small_Time 2
                 /* Measurements should last at least 2 seconds */
 #endif
diff --git a/UnixBench/src/fstime.c b/UnixBench/src/fstime.c
index 37b369b..822c88e 100644
--- a/UnixBench/src/fstime.c
+++ b/UnixBench/src/fstime.c
@@ -51,8 +51,6 @@ char SCCSid[] = "@(#) @(#)fstime.c:3.5 -- 5/15/91 19:30:19";
 #define FNAME0  "dummy0"
 #define FNAME1  "dummy1"
 
-extern void sync(void);
-
 int w_test(int timeSecs);
 int r_test(int timeSecs);
 int c_test(int timeSecs);
@@ -318,7 +316,6 @@ int r_test(int timeSecs)
         unsigned long tmp;
         double start, end;
         extern int sigalarm;
-        extern int errno;
 
         /* Sync and let it settle */
         sync();
diff --git a/UnixBench/src/time-polling.c b/UnixBench/src/time-polling.c
index 574b76b..a861258 100644
--- a/UnixBench/src/time-polling.c
+++ b/UnixBench/src/time-polling.c
@@ -376,9 +376,6 @@ char	*argv[];
     struct poll2ofd poll2ofd_array[MAX_FDS];
     long poll2_times[MAX_ITERATIONS];
 #endif
-#if 0
-    extern char *sys_errlist[];
-#endif
 
 #ifdef HAS_SELECT
     FD_ZERO (&input_fds);