diff --git a/aegisub/src/quicktime_common.cpp b/aegisub/src/quicktime_common.cpp
index 5956ad411..cb163040d 100644
--- a/aegisub/src/quicktime_common.cpp
+++ b/aegisub/src/quicktime_common.cpp
@@ -38,8 +38,13 @@
 #include "config.h"
 
 #ifdef WITH_QUICKTIME
-#include "quicktime_common.h"
 
+#ifndef AGI_PRE
+#include <wx/filename.h>
+#include <wx/string.h>
+#endif
+
+#include "quicktime_common.h"
 
 /// DOCME
 int QuickTimeProvider::qt_initcount = 0;
diff --git a/aegisub/src/video_provider_quicktime.cpp b/aegisub/src/video_provider_quicktime.cpp
index 2e5191b5d..55f779a60 100644
--- a/aegisub/src/video_provider_quicktime.cpp
+++ b/aegisub/src/video_provider_quicktime.cpp
@@ -38,6 +38,11 @@
 #include "config.h"
 
 #ifdef WITH_QUICKTIME
+
+#ifndef AGI_PRE
+#include <wx/msgdlg.h>
+#endif
+
 #include "aegisub_endian.h"
 #include "video_provider_quicktime.h"