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-rw-r--r--include/ruby/ruby.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index d56d42c86e..71205dcf05 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1108,7 +1108,7 @@ NORETURN(void rb_iter_break(void));
NORETURN(void rb_exit(int));
NORETURN(void rb_notimplement(void));
-/* reports if `-w' specified */
+/* reports if `-W' specified */
PRINTF_ARGS(void rb_warning(const char*, ...), 1, 2);
PRINTF_ARGS(void rb_compile_warning(const char *, int, const char*, ...), 3, 4);
PRINTF_ARGS(void rb_sys_warning(const char*, ...), 1, 2);