diff --git a/source/steamshim_parent/Makefile b/source/steamshim_parent/Makefile
index bcd3e197..8b97586b 100644
--- a/source/steamshim_parent/Makefile
+++ b/source/steamshim_parent/Makefile
@@ -29,7 +29,7 @@ else ifeq ($(HOST),w32)
 	FLAGS		+= -mwindows
 endif
 
-SRC			:= steamshim_parent.cpp
+SRC			:= $(wildcard *.cpp)
 # RES			:= resources.rc
 # RESOBJ		:= resources.o