diff --git a/sources/fileelementscollection.cpp b/sources/fileelementscollection.cpp
index b76bab07e..1243117e3 100644
--- a/sources/fileelementscollection.cpp
+++ b/sources/fileelementscollection.cpp
@@ -51,6 +51,7 @@ ElementsCategory *FileElementsCollection::rootCategory() {
 	Recharge l'arborescence des categories et elements.
 */
 void FileElementsCollection::reload() {
+	QMutexLocker reload_lock(&reload_mutex_);
 	// oublie l'arborescence precedente
 	deleteContent();
 	
diff --git a/sources/fileelementscollection.h b/sources/fileelementscollection.h
index a2498be16..70d4b3231 100644
--- a/sources/fileelementscollection.h
+++ b/sources/fileelementscollection.h
@@ -57,5 +57,6 @@ class FileElementsCollection : public ElementsCollection {
 	private:
 	QString coll_path;
 	FileElementsCategory *root;
+	QMutex reload_mutex_;       ///< Mutex used to avoid loading a collection twice at the same time
 };
 #endif