diff --git a/src/apps/musiccollection/FileMonitor.h b/src/apps/musiccollection/FileMonitor.h
index dac34d41da..d36b79b82d 100644
--- a/src/apps/musiccollection/FileMonitor.h
+++ b/src/apps/musiccollection/FileMonitor.h
@@ -30,7 +30,7 @@ struct WatchedFile {
 class NodeRefComp {
 public:
 	bool
-	operator()(const node_ref& a, const node_ref& b)
+	operator()(const node_ref& a, const node_ref& b) const
 	{
 		return a.node < b.node;
 	}
diff --git a/src/apps/musiccollection/MusicCollectionWindow.cpp b/src/apps/musiccollection/MusicCollectionWindow.cpp
index 40bad47880..8a9a1f56f0 100644
--- a/src/apps/musiccollection/MusicCollectionWindow.cpp
+++ b/src/apps/musiccollection/MusicCollectionWindow.cpp
@@ -19,6 +19,7 @@
 #include "ALMLayout.h"
 #include "ALMLayoutBuilder.h"
 
+#include <ctype.h>
 
 static int
 StringItemComp(const BListItem* first, const BListItem* second)