diff --git a/src/modules/uac/uac_send.c b/src/modules/uac/uac_send.c
index e0baf13a416..78dc7254539 100644
--- a/src/modules/uac/uac_send.c
+++ b/src/modules/uac/uac_send.c
@@ -42,7 +42,7 @@
 #include "uac_send.h"
 
 #define MAX_UACH_SIZE 2048
-#define MAX_UACB_SIZE 4086
+#define MAX_UACB_SIZE 32768
 #define MAX_UACD_SIZE 128
 
 /** TM bind */
@@ -823,4 +823,4 @@ int w_uac_req_send(struct sip_msg *msg, char *s1, char *s2)
 int ki_uac_req_send(sip_msg_t *msg)
 {
 	return uac_req_send();
-}
\ No newline at end of file
+}