diff --git a/SConstruct b/SConstruct
index 30d6e7653..78d281bb7 100644
--- a/SConstruct
+++ b/SConstruct
@@ -612,7 +612,7 @@ class DXXArchive(DXXCommon):
 '2d/pixel.cpp',
 '2d/rect.cpp',
 '2d/rle.cpp',
-'2d/scalec.c',
+'2d/scalec.cpp',
 '3d/clipper.c',
 '3d/draw.c',
 '3d/globvars.c',
diff --git a/common/2d/scalec.c b/common/2d/scalec.cpp
similarity index 100%
rename from common/2d/scalec.c
rename to common/2d/scalec.cpp