diff --git a/src/uptime/uptime.c.v b/src/uptime/uptime.c.v
index 008e6a03..3ea4dd20 100644
--- a/src/uptime/uptime.c.v
+++ b/src/uptime/uptime.c.v
@@ -1,4 +1,5 @@
 import os
+import math
 import common
 
 #include <time.h>
@@ -34,7 +35,7 @@ fn print_uptime(utmp_buf []C.utmpx) ! {
 				endptr := &char(0)
 				upsecs := C.strtod(&buf[0], &endptr)
 				if buf.bytestr() != endptr.vstring() {
-					if 0 <= upsecs && upsecs < max_f64 {
+					if 0 <= upsecs && upsecs < math.max_f64 {
 						uptime = i64(upsecs)
 					} else {
 						uptime = -1