diff --git a/Makefile b/Makefile
index 1dd34a4..f34e2ef 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ include os.mk
 include tcsip.mk
 
 RE_CFLAGS = -DHAVE_INTTYPES_H -DHAVE_STDBOOL_H \
-    -DHAVE_INET6 -DHAVE_GAI_STRERROR -DRELEASE
+    -DHAVE_INET6 -DHAVE_GAI_STRERROR -DRELEASE -D_XOPEN_SOURCE -D_DEFAULT_SOURCE
 
 INCL = -Ideps/include/ -I./src -I./src/util -I../srtp/include/ -I../srtp/crypto/include/ \
    -I../opus/include/ -I../speex/include  -Ig711 -I./src/rehttp/
diff --git a/src/tcsip/tcmedia.c b/src/tcsip/tcmedia.c
index e22a10c..3a8796c 100644
--- a/src/tcsip/tcmedia.c
+++ b/src/tcsip/tcmedia.c
@@ -1,5 +1,6 @@
 #include <srtp/srtp.h>
 #include <sys/time.h>
+#include <string.h>
 
 #include "re.h"
 #include "jitter/ajitter.h"
diff --git a/src/tcsip/tcmessage.c b/src/tcsip/tcmessage.c
index d5503a0..8f048b7 100644
--- a/src/tcsip/tcmessage.c
+++ b/src/tcsip/tcmessage.c
@@ -177,7 +177,7 @@ static int msend(struct tcmessages *tcmsg, struct sip_addr *to, struct mbuf *dat
 
     tm = gmtime(&tv.tv_sec);
     strftime(dt, sizeof dt , "Date: %a, %d %b %Y %H:%M:%S", tm);
-    snprintf(date, sizeof date, "%s.%06u GMT\r\n", dt, tv.tv_usec);
+    snprintf(date, sizeof date, "%s.%06lu GMT\r\n", dt, tv.tv_usec);
 
     err = sip_drequestf(&req, tcmsg->sip, true, "MESSAGE", dlg,
             0, NULL, message_sent, message_response, ctx,
diff --git a/src/util/ctime.c b/src/util/ctime.c
index 0b1e468..dc7d36b 100644
--- a/src/util/ctime.c
+++ b/src/util/ctime.c
@@ -30,7 +30,7 @@ bool find_date(const struct sip_hdr *hdr, const struct sip_msg *msg, void *arg)
     } else {
         ret = strptime(tmp.p, "%a, %d %b %Y %H:%M:%S.", &tm);
         if(ret) {
-            sscanf(ret, "%06u GMT", &tv->tv_usec);
+            sscanf(ret, "%06lu GMT", &tv->tv_usec);
         }
     }