diff --git a/.github/workflows/scripts/linux/install-tgui.sh b/.github/workflows/scripts/linux/install-tgui.sh
index 32c5cf971..876bcdccb 100755
--- a/.github/workflows/scripts/linux/install-tgui.sh
+++ b/.github/workflows/scripts/linux/install-tgui.sh
@@ -3,7 +3,7 @@
 git clone --depth 1 -b 0.9 https://github.com/texus/TGUI.git
 cd TGUI
 export CLICOLOR_FORCE=1
-cmake -D CMAKE_CXX_STANDARD=14 .
+cmake -D TGUI_CXX_STANDARD=14 .
 make
 cmake --install .
 cd .. # Probably not needed but...