diff --git a/src/graphics/PreviewLoader.cpp b/src/graphics/PreviewLoader.cpp
index 54913b3aec..8bec4cc922 100644
--- a/src/graphics/PreviewLoader.cpp
+++ b/src/graphics/PreviewLoader.cpp
@@ -203,7 +203,8 @@ public:
 	void add(string const & latex_snippet);
 	///
 	void remove(string const & latex_snippet);
-	///
+	/// \p wait whether to wait for the process to complete or, instead,
+	/// to do it in the background.
 	void startLoading(bool wait = false);
 
 	/// Emit this signal when an image is ready for display.