diff --git a/win32/docs/how2compile.txt b/win32/docs/how2compile.txt
index 05c3695a..528896e8 100644
--- a/win32/docs/how2compile.txt
+++ b/win32/docs/how2compile.txt
@@ -27,6 +27,7 @@ NOTE: Unicode support requires a special zlib build - see the end of the zlib en
     * glslang (optional, USE_SLANG define, enabled by default) - the default solution includes
       a series of projects encompassing glslang that build appropriately.
       The glslang source files should reside in win32/glslang/src
+      USE_SLANG also requires SPIRV-Cross, which should be placed in shaders/SPIRV-Cross
 
 - To compile Snes9x:
     Start up VS2017.