diff --git a/Effects/surface-lights-directional.eff b/Effects/surface-lights-directional.eff
index b9934fcd3..957a46a04 100644
--- a/Effects/surface-lights-directional.eff
+++ b/Effects/surface-lights-directional.eff
@@ -109,7 +109,8 @@
       <uniform>
         <name>is_directional</name>
         <type>bool</type>
-        <value><use>light-directional</use></value>
+	<!-- Short-term fix for unstable normals in taxiway lights -->
+        <value>false</value>
       </uniform>
       <uniform>
         <name>texture</name>