diff --git a/src/network/kernel/qnetworkinterface_linux.cpp b/src/network/kernel/qnetworkinterface_linux.cpp
index 620ee7202be..3211d1b8d8b 100644
--- a/src/network/kernel/qnetworkinterface_linux.cpp
+++ b/src/network/kernel/qnetworkinterface_linux.cpp
@@ -158,7 +158,7 @@ template <typename Lambda> struct ProcessNetlinkRequest
     void operator()(int sock, nlmsghdr *hdr, char *buf, size_t bufsize, Lambda &&func)
     {
         // send the request
-        if (send(sock, hdr, hdr->nlmsg_len, 0) != hdr->nlmsg_len)
+        if (send(sock, hdr, hdr->nlmsg_len, 0) != ssize_t(hdr->nlmsg_len))
             return;
 
         // receive and parse the request