diff --git a/src/net.cpp b/src/net.cpp
index d218dcfb5db..5d1a1570505 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -621,7 +621,7 @@ void ThreadSocketHandler2(void* parg)
         if (nSelect == SOCKET_ERROR)
         {
             int nErr = WSAGetLastError();
-            if (hSocketMax > -1)
+            if (hSocketMax > (SOCKET) -1)
             {
                 printf("socket select error %d\n", nErr);
                 for (unsigned int i = 0; i <= hSocketMax; i++)