diff --git a/src/sip/sipcall.cpp b/src/sip/sipcall.cpp
index dca849a2f..3a6a7e908 100644
--- a/src/sip/sipcall.cpp
+++ b/src/sip/sipcall.cpp
@@ -1329,7 +1329,10 @@ SIPCall::InvSessionDeleter::operator ()(pjsip_inv_session* inv) const noexcept
 {
     // prevent this from getting accessed in callbacks
     // JAMI_WARN: this is not thread-safe!
+    if (!inv) return;
     inv->mod_data[getSIPVoIPLink()->getModId()] = nullptr;
+    // NOTE: the counter is incremented by sipvoiplink (transaction_request_cb)
+    pjsip_inv_dec_ref(inv);
 }
 
 bool
diff --git a/src/sip/sipvoiplink.cpp b/src/sip/sipvoiplink.cpp
index aa055ba82..8995b100e 100644
--- a/src/sip/sipvoiplink.cpp
+++ b/src/sip/sipvoiplink.cpp
@@ -385,6 +385,11 @@ transaction_request_cb(pjsip_rx_data *rdata)
     pjsip_dlg_dec_lock(dialog);
 
     inv->mod_data[mod_ua_.id] = call.get();
+    // NOTE: The invitation counter is managed by pjsip. If that counter goes down to zero
+    // the invite will be destroyed, and the unique_ptr will point freed datas.
+    // To avoid this, we increment the ref counter and let our unique_ptr manage
+    // when the invite will be freed
+    pjsip_inv_add_ref(inv);
     call->inv.reset(inv);
 
     // Check whether Replaces header is present in the request and process accordingly.