diff --git a/UnixBench/src/syscall.c b/UnixBench/src/syscall.c
index f0e0683..b44ee41 100644
--- a/UnixBench/src/syscall.c
+++ b/UnixBench/src/syscall.c
@@ -28,6 +28,7 @@ char SCCSid[] = "@(#) @(#)syscall.c:3.3 -- 5/15/91 19:30:21";
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/syscall.h>
 #include "timeit.c"
 
 unsigned long iter;
@@ -65,7 +66,7 @@ char	*argv[];
         case 'm':
 	   while (1) {
 		close(dup(0));
-		getpid();
+		syscall(SYS_getpid);
 		getuid();
 		umask(022);
 		iter++;
@@ -79,7 +80,7 @@ char	*argv[];
            /* NOTREACHED */
         case 'g':
            while (1) {
-                getpid();
+                syscall(SYS_getpid);
                 iter++;
            }
            /* NOTREACHED */