diff --git a/src/tcp_address.cpp b/src/tcp_address.cpp
index 708b4ef8..11e51902 100644
--- a/src/tcp_address.cpp
+++ b/src/tcp_address.cpp
@@ -371,12 +371,11 @@ zmq::tcp_address_t::tcp_address_t (const sockaddr *sa, socklen_t sa_len)
     zmq_assert(sa && sa_len > 0);
 
     memset (&address, 0, sizeof (address));
-    if (sa->sa_family == AF_INET && sa_len >= (socklen_t) sizeof (address.ipv4)) {
+    if (sa->sa_family == AF_INET && (size_t) sa_len >= (socklen_t) sizeof (address.ipv4))
         memcpy(&address.ipv4, sa, sizeof (address.ipv4));
-    }
-    else if (sa->sa_family == AF_INET6 && sa_len >= (socklen_t) sizeof (address.ipv6)) {
+    else 
+    if (sa->sa_family == AF_INET6 && (size_t) sa_len >= (socklen_t) sizeof (address.ipv6))
         memcpy(&address.ipv6, sa, sizeof (address.ipv6));
-    }
 }
 
 zmq::tcp_address_t::~tcp_address_t ()
@@ -577,7 +576,7 @@ int zmq::tcp_address_mask_t::to_string (std::string &addr_)
 
 const bool zmq::tcp_address_mask_t::match_address (const struct sockaddr *ss, const socklen_t ss_len) const
 {
-    zmq_assert (address_mask != -1 && ss != NULL && ss_len >= (socklen_t) sizeof (struct sockaddr));
+    zmq_assert (address_mask != -1 && ss != NULL && (socklen_t) ss_len >= (socklen_t) sizeof (struct sockaddr));
 
     if (ss->sa_family != address.generic.sa_family)
         return false;