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-rw-r--r--libc/stdio/_stdio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libc/stdio/_stdio.h b/libc/stdio/_stdio.h
index ec98f9e0e..2c0efc986 100644
--- a/libc/stdio/_stdio.h
+++ b/libc/stdio/_stdio.h
@@ -408,7 +408,7 @@ extern int __stdio_adjust_position(FILE *__restrict stream, __offmax_t *pos) att
#ifdef NDEBUG
#define __STDIO_STREAM_VALIDATE(S) ((void)0)
#else
-extern void _stdio_validate_FILE(const FILE *stream);
+extern void _stdio_validate_FILE(const FILE *stream) attribute_hidden;
#define __STDIO_STREAM_VALIDATE(S) _stdio_validate_FILE((S))
#endif