diff --git a/TellusAgent.c b/TellusAgent.c
index 5665b0e..4e53989 100644
--- a/TellusAgent.c
+++ b/TellusAgent.c
@@ -517,7 +517,7 @@ int main(int argc, const char* argv[])
           struct sockaddr_in* address = repeaterSocketAddresses + selection;
 
           // Move to additional buffer to keep initial value
-          address += PROXY_PORT_COUNT * (address->si_family != AF_UNSPEC);
+          address += PROXY_PORT_COUNT * (address->sin_family != AF_UNSPEC);
 
           size_t length = recvfrom(handle, buffer, BUFFER_SIZE, 0, (struct sockaddr*)address, &size);