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diff --git a/gl/stdio.in.h b/gl/stdio.in.h
index 06d9780..fa04a10 100644
--- a/gl/stdio.in.h
+++ b/gl/stdio.in.h
@@ -713,10 +713,13 @@ _GL_CXXALIAS_SYS (gets, char *, (char *s));
# endif
_GL_CXXALIASWARN (gets);
/* It is very rare that the developer ever has full control of stdin,
- so any use of gets warrants an unconditional warning. Assume it is
- always declared, since it is required by C89. */
+ so any use of gets warrants an unconditional warning; besides C11
+ removed it. */
+#ifdef gets
+#undef gets
_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
#endif
+#endif
#if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
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