diff --git a/README.md b/README.md
index efe03f45..ef0b349f 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,7 @@ Packaging for your favorite distribution would be a welcome contribution!
 
     ```
     cd monero-gui
-    ./build.sh
+    QT_SELECT=5 ./build.sh
     ```
 
 The executable can be found in the build/release/bin folder.