diff --git a/nmap.cc b/nmap.cc
index c8c7371f7..156585047 100644
--- a/nmap.cc
+++ b/nmap.cc
@@ -1340,7 +1340,7 @@ int nmap_main(int argc, char *argv[]) {
     if (o.scan_delay > o.maxTCPScanDelay()) o.setMaxTCPScanDelay(o.scan_delay);
     if (o.scan_delay > o.maxUDPScanDelay()) o.setMaxUDPScanDelay(o.scan_delay);
     if (o.scan_delay > o.maxSCTPScanDelay()) o.setMaxSCTPScanDelay(o.scan_delay);
-    if (pre_max_parallelism != -1 || o.min_parallelism != -1)
+    if (pre_max_parallelism != -1 || o.min_parallelism != 0)
       error("Warning: --min-parallelism and --max-parallelism are ignored with --scan-delay.");
   }
   if (pre_max_scan_delay != -1) {