diff --git a/CMakeLists.txt b/CMakeLists.txt
index 925184ae..69fb16cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ if (MSVC)
 
     add_compile_options(
         /bigobj       # large object file format
-        /permissive-  # strict C++
+        #/permissive-  # strict C++
         #/wd4503      # decorated name length exceeded, name was truncated
         /W4           # enable all warnings
         /MP           # Multi-processor compilation