diff --git a/lib/libc/stdio/vfprintf.c b/lib/libc/stdio/vfprintf.c
index 06d5e94d8561..45e7c7fbc14c 100644
--- a/lib/libc/stdio/vfprintf.c
+++ b/lib/libc/stdio/vfprintf.c
@@ -908,6 +908,7 @@ reswitch:	switch (ch) {
 				} else
 					cp = (ch >= 'a') ? "inf" : "INF";
 				size = 3;
+				flags &= ~ZEROPAD;
 				break;
 			}
 			flags |= FPT;