diff --git a/pcap_to_node_pcap/main.cpp b/pcap_to_node_pcap/main.cpp
index f42f5918..00d5fe1a 100644
--- a/pcap_to_node_pcap/main.cpp
+++ b/pcap_to_node_pcap/main.cpp
@@ -223,7 +223,7 @@ int main(int argc, char* argv[])
 	bool paramWasSet = false;
 
 	int optionIndex = 0;
-	char opt = 0;
+	int opt = 0;
 
 	while((opt = getopt_long (argc, argv, "f:o:m:p:i:vh", PcapSplitterOptions, &optionIndex)) != -1)
 	{