diff --git a/lib/libc/io/stdio/fputc.c b/lib/libc/io/stdio/fputc.c
index df41978..3a323a7 100644
--- a/lib/libc/io/stdio/fputc.c
+++ b/lib/libc/io/stdio/fputc.c
@@ -15,6 +15,7 @@ int __fputc(int c, struct __opaque_file *stream)
 		return EOF;
 	}
 
+	__set_errno(SUCCESS);
 	return c;
 }