diff --git a/libass/Makefile.am b/libass/Makefile.am
index df7e6db38..98d763137 100644
--- a/libass/Makefile.am
+++ b/libass/Makefile.am
@@ -1,7 +1,26 @@
 noinst_LIBRARIES = libass_aegisub.a
 
 libass_aegisub_a_CPPFLAGS = @FREETYPE_CFLAGS@ -DHAVE_FONTCONFIG -DUSE_ICONV @FONTCONFIG_CFLAGS@
-libass_aegisub_a_SOURCES = ass.c ass_cache.c ass_font.c ass_fontconfig.c ass_render.c \
-                    ass_utils.c ass_bitmap.c ass_library.c mputils.c \
-                    ass_bitmap.h ass_cache.h ass_fontconfig.h ass_font.h ass.h \
-                    ass_library.h ass_types.h ass_utils.h help_mp.h mputils.h
+
+libass_aegisub_a_SOURCES = \
+	ass.c \
+	ass_bitmap.c \
+	ass_cache.c \
+	ass_font.c \
+	ass_fontconfig.c \
+	ass_library.c \
+	ass_render.c \
+	ass_utils.c \
+	mputils.c \
+	ass.h \
+	ass_bitmap.h \
+	ass_cache.h \
+	ass_font.h \
+	ass_fontconfig.h \
+	ass_library.h \
+	ass_types.h \
+	ass_utils.h \
+	help_mp.h \
+	libass_msvc.patch \
+	mputils.h \
+	msvc.h