1 files changed, 1 insertions, 1 deletions
diff --git a/defines.h b/defines.h
index d9b744b71f..f28724dc45 100644
--- a/defines.h
+++ b/defines.h
@@ -13,7 +13,7 @@
 #define RUBY
 
 /* define RUBY_USE_EUC/SJIS for default kanji-code */
-#if defined(MSDOS) || defined(__CYGWIN32__) || defined(__human68k__) || defined(__MACOS__)
+#if defined(MSDOS) || defined(__CYGWIN32__) || defined(__human68k__) || defined(__MACOS__) || defined(__EMX__) || defined(OS2)
 #undef RUBY_USE_EUC
 #define RUBY_USE_SJIS
 #else