diff --git a/aegisub/src/Makefile b/aegisub/src/Makefile
index 7eb976875..8e5d1b4ac 100644
--- a/aegisub/src/Makefile
+++ b/aegisub/src/Makefile
@@ -109,6 +109,7 @@ font_file_lister_fontconfig.o: CXXFLAGS += $(CFLAGS_FONTCONFIG)
 text_file_reader.o:            CXXFLAGS += -D_X86_
 video_provider_manager.o:      CXXFLAGS += $(CFLAGS_FFMS2)
 auto4_lua.o auto4_lua_assfile.o auto4_lua_dialog.o  auto4_lua_progresssink.o auto4_lua_regex.o auto4_lua_scriptreader.o auto4_regex.o: CXXFLAGS += $(CFLAGS_LUA)
+lpeg.o: CFLAGS += $(CFLAGS_LUA)
 
 SRC += \
 	MatroskaParser.c \