diff --git a/SConstruct b/SConstruct
index 83361d4ee..7e3235995 100644
--- a/SConstruct
+++ b/SConstruct
@@ -807,7 +807,7 @@ class DXXProgram(DXXCommon):
 'main/weapon.cpp',
 'mem/mem.cpp',
 'misc/args.cpp',
-'misc/hash.c',
+'misc/hash.cpp',
 'misc/physfsx.c',
 ]
 ],
diff --git a/similar/misc/hash.c b/similar/misc/hash.cpp
similarity index 100%
rename from similar/misc/hash.c
rename to similar/misc/hash.cpp