diff --git a/src/detection/uptime/uptime_bsd.c b/src/detection/uptime/uptime_bsd.c
index 47202544a..446a95e25 100644
--- a/src/detection/uptime/uptime_bsd.c
+++ b/src/detection/uptime/uptime_bsd.c
@@ -6,7 +6,11 @@
 
 const char* ffDetectUptime(FFUptimeResult* result)
 {
+    #if __NetBSD__
+    struct timespec bootTime;
+    #else
     struct timeval bootTime;
+    #endif
     size_t bootTimeSize = sizeof(bootTime);
     if(sysctl(
         (int[]) {CTL_KERN, KERN_BOOTTIME}, 2,
@@ -15,7 +19,11 @@ const char* ffDetectUptime(FFUptimeResult* result)
     ) != 0)
         return "sysctl({CTL_KERN, KERN_BOOTTIME}) failed";
 
+    #if __NetBSD__
+    result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_nsec / 10000000;
+    #else
     result->bootTime = (uint64_t) bootTime.tv_sec * 1000 + (uint64_t) bootTime.tv_usec / 1000;
+    #endif
     result->uptime = ffTimeGetNow() - result->bootTime;
 
     return NULL;