diff --git a/nt/INSTALL b/nt/INSTALL
index 5a76f5bdeda..c324fb4ae7d 100644
--- a/nt/INSTALL
+++ b/nt/INSTALL
@@ -745,7 +745,7 @@ build will run on Windows 9X and newer systems).
 
     https://developers.google.com/speed/webp/
 
-  were compiled by MSVC, and include only static libraries, no DLLs.
+  was compiled by MSVC, and includes only static libraries, no DLLs.
   So you cannot use that to build Emacs with WebP support on
   MS-Windows, as that needs libwebp as a DLL.