diff --git a/libc/stdio/putc.c b/libc/stdio/putc.c
index 9250215..2b05504 100644
--- a/libc/stdio/putc.c
+++ b/libc/stdio/putc.c
@@ -60,8 +60,8 @@
 {
 	int ret;
 
-	flockfile(fp);
+	FLOCKFILE(fp);
 	ret = putc_unlocked(c, fp);
-	funlockfile(fp);
+	FUNLOCKFILE(fp);
 	return (ret);
 }