diff --git a/NOTES.WIN b/NOTES.WIN
index b3d19671bf7c46eb9f216460eb5571b63af9ca4c..00ffb4a8db0b4ad5aa2d079c30d95dfa8b0b1c3d 100644
--- a/NOTES.WIN
+++ b/NOTES.WIN
@@ -95,7 +95,7 @@
    required. Run the installers and do whatever magic they say it takes
    to start MSYS bash shell with GNU tools and matching Perl on its PATH.
    "Matching Perl" refers to chosen "shell environment", i.e. if built
-   under MSYS, then Perl compiled for MSYS is highly recommended.
+   under MSYS, then Perl compiled for MSYS must be used.
 
    Alternativelly, one can use MSYS2 from http://msys2.github.io/,
    which includes MingW (32-bit and 64-bit).