diff --git a/src/network/CMakeLists.txt b/src/network/CMakeLists.txt
index e39f13650f8..3283260c66a 100644
--- a/src/network/CMakeLists.txt
+++ b/src/network/CMakeLists.txt
@@ -212,6 +212,8 @@ qt_internal_extend_target(Network CONDITION WIN32
         iphlpapi
         secur32
         winhttp
+    DEFINES
+        NOMINMAX
 )
 
 qt_internal_extend_target(Network CONDITION QT_FEATURE_dnslookup AND WIN32