diff -Nur iperf-3.0.1.orig/src/iperf_api.c iperf-3.0.1/src/iperf_api.c
--- iperf-3.0.1.orig/src/iperf_api.c	2014-01-18 16:25:22.705600335 +0530
+++ iperf-3.0.1/src/iperf_api.c	2014-01-18 16:26:09.812597805 +0530
@@ -533,7 +533,7 @@
         {"file", required_argument, NULL, 'F'},
         {"affinity", required_argument, NULL, 'A'},
         {"title", required_argument, NULL, 'T'},
-#if defined(linux)
+#if defined(linux) && defined(TCP_CONGESTION) 
         {"linux-congestion", required_argument, NULL, 'C'},
 #endif
         {"help", no_argument, NULL, 'h'},
@@ -734,7 +734,7 @@
 		client_flag = 1;
                 break;
 	    case 'C':
-#if defined(linux)
+#if defined(linux) && defined(TCP_CONGESTION) 
 		test->congestion = strdup(optarg);
 		client_flag = 1;
 #else /* linux */
diff -Nur iperf-3.0.1.orig/src/iperf_tcp.c iperf-3.0.1/src/iperf_tcp.c
--- iperf-3.0.1.orig/src/iperf_tcp.c	2014-01-18 16:25:22.704600335 +0530
+++ iperf-3.0.1/src/iperf_tcp.c	2014-01-18 16:26:15.455597502 +0530
@@ -184,7 +184,7 @@
                 return -1;
             }
         }
-#if defined(linux)
+#if defined(linux) && defined(TCP_CONGESTION) 
 	if (test->congestion) {
 	    if (setsockopt(s, IPPROTO_TCP, TCP_CONGESTION, test->congestion, strlen(test->congestion)) < 0) {
 		close(s);
@@ -373,7 +373,7 @@
     }
 #endif
 
-#if defined(linux)
+#if defined(linux) && defined(TCP_CONGESTION) 
     if (test->congestion) {
 	if (setsockopt(s, IPPROTO_TCP, TCP_CONGESTION, test->congestion, strlen(test->congestion)) < 0) {
 	    close(s);