diff --git a/src/MushRuby/lex.c b/src/MushRuby/lex.c

index a851447..f2f8396 100644

--- a/src/MushRuby/lex.c

+++ b/src/MushRuby/lex.c

@@ -93,7 +93,7 @@ hash (str, len)

 }

 #ifdef __GNUC__

-__inline

+extern __inline

 #endif

 struct kwtable *

 rb_reserved_word (str, len)