Explicit constructor to avoid implicit constructor-conversions-calls

diff --git a/src/dns/dnsresolver.h b/src/dns/dnsresolver.h
index 656e07b..88743f3 100644 (file)
--- a/src/dns/dnsresolver.h
+++ b/src/dns/dnsresolver.h
@@ -13,7 +13,7 @@ class HostAddress;
 class DnsResolver
 {
 public:
-    DnsResolver( std::string dns_address );
+    explicit DnsResolver( std::string dns_address );
     virtual ~DnsResolver();
 
     std::string get_next_ip();