diff --git a/lib/colmgr.cpp b/lib/colmgr.cpp
index 5bcc7e95..9784c97b 100644
--- a/lib/colmgr.cpp
+++ b/lib/colmgr.cpp
@@ -36,7 +36,11 @@ static Library *find_library(const Gtk::TreeModel::Row &row)
 
 static void list_path(Library *lib)
 {
-	Gtk::TreeModel::Row row = *(c_list->append());
+	Gtk::TreeModel::Row row;
+
+	if (!lib)
+		return;
+	row = *(c_list->append());
 
 	row[c_cols.c_id] = lib->id;
 	row[c_cols.c_enabled] = lib->enabled;