diff --git a/aegisub/Makefile.am b/aegisub/Makefile.am
index 71c5522c2..e468839fc 100644
--- a/aegisub/Makefile.am
+++ b/aegisub/Makefile.am
@@ -128,7 +128,6 @@ EXTRA_aegisub_SOURCES = \
 	avisynth.h \
 	avisynth_wrap.cpp \
 	dialog_associations.cpp \
-	factory.h \
 	lavc_file.cpp \
 	lavc_keyframes.cpp \
 	setup.cpp \