diff --git a/contrib/libpcap/scanner.l b/contrib/libpcap/scanner.l
index 54141499e01..c90d2a8cbc6 100644
--- a/contrib/libpcap/scanner.l
+++ b/contrib/libpcap/scanner.l
@@ -273,6 +273,7 @@ lex_init(buf)
 	char *buf;
 {
 	in_buffer = buf;
+	yyrestart(NULL);
 }
 
 /*