diff --git a/pandora_console/ChangeLog b/pandora_console/ChangeLog
index 09766953a4..1b512c5625 100644
--- a/pandora_console/ChangeLog
+++ b/pandora_console/ChangeLog
@@ -1,3 +1,9 @@
+2014-05-22  Sergio Martin <sergio.martin@artica.es>
+
+	* include/functions_graph.php: Fix end of unknown
+	periods in graphs when activate events storm protection
+	or other prevent events triggering
+
 2014-05-22 Juan Manuel Ramon <juanmanuel.ramon@artica.es>
 
 	* godmode/groups/group_list.php: Dont show void agents
diff --git a/pandora_console/include/functions_graph.php b/pandora_console/include/functions_graph.php
index bfa23c0498..8863758737 100755
--- a/pandora_console/include/functions_graph.php
+++ b/pandora_console/include/functions_graph.php
@@ -290,6 +290,8 @@ function grafico_modulo_sparse_data_chart (&$chart, &$chart_data_extra, &$long_i
 		// Data in the interval
 		if ($count > 0) {
 			$total /= $count;
+			// If detect data, unknown period finishes
+			$is_unknown = false;
 		}
 		
 		// Read events and alerts that fall in the current interval