diff --git a/scapy/arch/libpcap.py b/scapy/arch/libpcap.py
index e24ab131563..4c5b2f00efd 100644
--- a/scapy/arch/libpcap.py
+++ b/scapy/arch/libpcap.py
@@ -66,8 +66,7 @@
 ############
 
 # From BSD net/bpf.h
-# BIOCIMMEDIATE = 0x80044270
-BIOCIMMEDIATE = -2147204496
+BIOCIMMEDIATE = 0x80044270
 
 # https://github.com/the-tcpdump-group/libpcap/blob/master/pcap/pcap.h
 PCAP_IF_UP = 0x00000002  # interface is up