diff --git a/support/ab.c b/support/ab.c
index ce8b209..ec345cd 100644
--- a/support/ab.c
+++ b/support/ab.c
@@ -299,6 +299,7 @@ char proxyhost[1024];   /* proxy host name */
 int proxyport = 0;      /* proxy port */
 char *connecthost;
 apr_port_t connectport;
+char *src_address;
 char *gnuplot;          /* GNUplot file */
 char *csvperc;          /* CSV Percentile file */
 char url[1024];
@@ -1147,6 +1148,7 @@ static void output_html_results(void)
 static void start_connect(struct connection * c)
 {
     apr_status_t rv;
+    apr_sockaddr_t *from;
 
     if (!(started < requests))
     return;
@@ -1170,6 +1172,13 @@ static void start_connect(struct connection * c)
          != APR_SUCCESS) {
         apr_err("socket nonblock", rv);
     }
+    if (src_address) {
+        if ((rv = apr_sockaddr_info_get(&from, src_address, destsa->family,
+                0, 0, c->ctx)) != APR_SUCCESS)
+                apr_err("src_address get", rv);
+        if ((rv = apr_socket_bind(c->aprsock, from)) != APR_SUCCESS)
+            apr_err("src_address bind", rv);
+    }
 
     if (windowsize != 0) {
         rv = apr_socket_opt_set(c->aprsock, APR_SO_SNDBUF, 
@@ -1866,6 +1875,7 @@ static void usage(const char *progname)
     fprintf(stderr, "    -P attribute    Add Basic Proxy Authentication, the attributes\n");
     fprintf(stderr, "                    are a colon separated username and password.\n");
     fprintf(stderr, "    -X proxy:port   Proxyserver and port number to use\n");
+    fprintf(stderr, "    -s src_address  Set the local source address\n");
     fprintf(stderr, "    -V              Print version number and exit\n");
     fprintf(stderr, "    -k              Use HTTP KeepAlive feature\n");
     fprintf(stderr, "    -d              Do not show percentiles served table.\n");
@@ -2040,7 +2050,7 @@ int main(int argc, const char * const argv[])
 #endif
 
     apr_getopt_init(&opt, cntxt, argc, argv);
-    while ((status = apr_getopt(opt, "n:c:t:b:T:p:u:v:rkVhwix:y:z:C:H:P:A:g:X:de:Sq"
+    while ((status = apr_getopt(opt, "s:n:c:t:b:T:p:u:v:rkVhwix:y:z:C:H:P:A:g:X:de:Sq"
 #ifdef USE_SSL
             "Z:f:"
 #endif
@@ -2064,6 +2074,9 @@ int main(int argc, const char * const argv[])
             case 'b':
                 windowsize = atoi(optarg);
                 break;
+            case 's':
+                src_address = strdup(optarg);
+                break;
             case 'i':
                 if (posting > 0)
                 err("Cannot mix POST/PUT and HEAD\n");