diff --git a/src/ActiveProjects.cpp b/src/ActiveProjects.cpp
index a8b4f04bf..4215cac75 100644
--- a/src/ActiveProjects.cpp
+++ b/src/ActiveProjects.cpp
@@ -13,7 +13,7 @@
 
 #include "Audacity.h"
 #include "ActiveProjects.h"
-#include "prefs.h"
+#include "Prefs.h"
 
 #include <wx/filename.h>