diff --git a/SConstruct b/SConstruct
index 45cf2f876..cf2da9b7c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -764,7 +764,7 @@ class DXXProgram(DXXCommon):
 'main/game.cpp',
 'main/gamecntl.cpp',
 'main/gamefont.cpp',
-'main/gamerend.c',
+'main/gamerend.cpp',
 'main/gamesave.c',
 'main/gameseg.c',
 'main/gauges.c',
diff --git a/similar/main/gamerend.c b/similar/main/gamerend.cpp
similarity index 100%
rename from similar/main/gamerend.c
rename to similar/main/gamerend.cpp