diff --git a/Building-for-Windows.md b/Building-for-Windows.md
index e57e2e2..946ed22 100644
--- a/Building-for-Windows.md
+++ b/Building-for-Windows.md
@@ -91,7 +91,7 @@ mingw32-make -j4
 #### Creating a static build (Optional)
 
   * Instead of installing `mingw-w64-x86_64-qt5` install `mingw-w64-x86_64-qt5-static`
-  * Add `-DMINGW_STATIC_BUILD` to the cmake command line
+  * Add `-DMINGW_STATIC_BUILD=1` to the cmake command line
 
 #### Building without Qt (Optional)