diff --git a/libs/sofia-sip/libsofia-sip-ua/stun/stun.c b/libs/sofia-sip/libsofia-sip-ua/stun/stun.c
index 992686d52a..d7b57977e9 100644
--- a/libs/sofia-sip/libsofia-sip-ua/stun/stun.c
+++ b/libs/sofia-sip/libsofia-sip-ua/stun/stun.c
@@ -40,6 +40,7 @@
 #include <assert.h>
 #include <string.h>
 #include <time.h>
+#include <stdlib.h>
 
 #define SU_ROOT_MAGIC_T struct stun_magic_t
 
diff --git a/libs/sofia-sip/libsofia-sip-ua/stun/stun_common.c b/libs/sofia-sip/libsofia-sip-ua/stun/stun_common.c
index f7d09460f6..f028746359 100644
--- a/libs/sofia-sip/libsofia-sip-ua/stun/stun_common.c
+++ b/libs/sofia-sip/libsofia-sip-ua/stun/stun_common.c
@@ -44,6 +44,7 @@
 #include "stun_internal.h"
 
 #include <string.h>
+#include <stdlib.h>
 #include <assert.h>
 
 #if HAVE_FUNC
diff --git a/libs/sofia-sip/libsofia-sip-ua/stun/stun_mini.c b/libs/sofia-sip/libsofia-sip-ua/stun/stun_mini.c
index 86259c21aa..1df754c149 100644
--- a/libs/sofia-sip/libsofia-sip-ua/stun/stun_mini.c
+++ b/libs/sofia-sip/libsofia-sip-ua/stun/stun_mini.c
@@ -40,6 +40,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <stdlib.h>
 
 typedef struct stun_bound_s stun_bound_t;