diff --git a/ThirdParty/CMakeLists.txt b/ThirdParty/CMakeLists.txt
index cfc9b888e1ad95e786561205af24079d35312b6a..3dae343e109b8b29c4a7a37a35e89281b265b246 100644
--- a/ThirdParty/CMakeLists.txt
+++ b/ThirdParty/CMakeLists.txt
@@ -51,6 +51,7 @@ endif()
 
 if(OGS_BUILD_SWMM)
     add_subdirectory(SWMMInterface)
+    set_target_properties(SWMM SwmmInterface PROPERTIES COMPILE_FLAGS /W0)
 endif()
 
 if(OGS_BUILD_METIS)