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-rw-r--r--libc/stdio/__fsetlocking.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libc/stdio/__fsetlocking.c b/libc/stdio/__fsetlocking.c
index 2e8710076..746a098f9 100644
--- a/libc/stdio/__fsetlocking.c
+++ b/libc/stdio/__fsetlocking.c
@@ -9,6 +9,9 @@
#include <stdio_ext.h>
libc_hidden_proto(__fsetlocking)
+#ifdef __UCLIBC_HAS_THREADS__
+libc_hidden_proto(_stdio_user_locking)
+#endif
/* Not threadsafe. */