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--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -702,10 +702,12 @@
/* It is very rare that the developer ever has full control of stdin,
so any use of gets warrants an unconditional warning; besides, C11
removed it. */
+#ifdef gets
#undef gets
#if HAVE_RAW_DECL_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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