diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 50e770fe70..e187314fda 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -150,7 +150,7 @@ endif()
 
 if(MSVC)
   # TODO: Find a way to do this cleanly for non MSVC users.
-  set(SM_COMPILE_FLAGS "${SM_COMPILE_FLAGS} /MP2 /utf-8")
+  set(SM_COMPILE_FLAGS "${SM_COMPILE_FLAGS} /MP /permissive- /utf-8")
 endif()
 
 set_target_properties("${SM_EXE_NAME}"