diff --git a/data/carla-bridge-lv2-modgui b/data/carla-bridge-lv2-modgui
index f1a7e74ec..639692a27 100755
--- a/data/carla-bridge-lv2-modgui
+++ b/data/carla-bridge-lv2-modgui
@@ -7,4 +7,5 @@ else
 fi
 
 INSTALL_PREFIX="X-PREFIX-X"
+export CARLA_LIB_PREFIX="$INSTALL_PREFIX"
 exec $PYTHON "$INSTALL_PREFIX"/share/carla/carla_modgui.py "$@"