diff --git a/SConstruct b/SConstruct
index 8bfd3a8ab..eab7f120c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -804,7 +804,7 @@ class DXXProgram(DXXCommon):
 'main/titles.cpp',
 'main/vclip.cpp',
 'main/wall.cpp',
-'main/weapon.c',
+'main/weapon.cpp',
 'mem/mem.cpp',
 'misc/args.cpp',
 'misc/hash.c',
diff --git a/similar/main/weapon.c b/similar/main/weapon.cpp
similarity index 100%
rename from similar/main/weapon.c
rename to similar/main/weapon.cpp