diff --git a/src/detection/uptime/uptime_bsd.c b/src/detection/uptime/uptime_bsd.c
index 446a95e25..57a17b0d7 100644
--- a/src/detection/uptime/uptime_bsd.c
+++ b/src/detection/uptime/uptime_bsd.c
@@ -20,7 +20,7 @@ const char* ffDetectUptime(FFUptimeResult* result)
         return "sysctl({CTL_KERN, KERN_BOOTTIME}) failed";
 
     #if __NetBSD__
-    result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_nsec / 10000000;
+    result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_nsec / 1000000;
     #else
     result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_usec / 1000;
     #endif