diff --git a/debian/patches/series b/debian/patches/series
index 85649720d..a8564a91f 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -4,6 +4,7 @@
 #
 # upsream fixes from master
 upstream/pv-new-function-pv_evalx-dst-fmt.patch
+upstream/presence-fix-crash-when-no-dialog.id-on-dialog-info-.patch
 #
 ##
 no_lib64_on_64_bits.patch
diff --git a/debian/patches/upstream/presence-fix-crash-when-no-dialog.id-on-dialog-info-.patch b/debian/patches/upstream/presence-fix-crash-when-no-dialog.id-on-dialog-info-.patch
new file mode 100644
index 000000000..febd1abdc
--- /dev/null
+++ b/debian/patches/upstream/presence-fix-crash-when-no-dialog.id-on-dialog-info-.patch
@@ -0,0 +1,32 @@
+From: Victor Seva <linuxmaniac@torreviejawireless.org>
+Date: Fri, 23 Sep 2016 11:11:56 +0200
+Subject: presence: fix crash when no dialog.id on dialog-info xml
+
+Fix #794
+---
+ modules/presence/presentity.c | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/modules/presence/presentity.c b/modules/presence/presentity.c
+index b78f84a..629bda4 100644
+--- a/modules/presence/presentity.c
++++ b/modules/presence/presentity.c
+@@ -686,13 +686,13 @@ int update_presentity(struct sip_msg* msg, presentity_t* presentity, str* body,
+ 			}
+ 
+ 			check_if_dialog(*body, &is_dialog, &dialog_id);
++			if (is_dialog == 1) {
++				if (delete_presentity_if_dialog_id_exists(presentity, dialog_id) < 0) {
++					goto error;
++				}
+ 
+-			if (delete_presentity_if_dialog_id_exists(presentity, dialog_id) < 0) {
+-				goto error;
++				free(dialog_id);
+ 			}
+-
+-			free(dialog_id);
+-
+ 			LM_DBG("inserting %d cols into table\n",n_query_cols);
+ 
+ 			if (pa_dbf.insert(pa_db, query_cols, query_vals, n_query_cols) < 0)