diff --git a/Shaders/light-ALS.frag b/Shaders/light-ALS.frag
index e52250bdf..5b40b2ceb 100644
--- a/Shaders/light-ALS.frag
+++ b/Shaders/light-ALS.frag
@@ -1,4 +1,5 @@
 // -*-C++-*-
+#version 120
 
 uniform sampler2D texture;
 
diff --git a/Shaders/surface-light-ALS.frag b/Shaders/surface-light-ALS.frag
index 3dd1bbb40..dd725d75d 100644
--- a/Shaders/surface-light-ALS.frag
+++ b/Shaders/surface-light-ALS.frag
@@ -1,4 +1,5 @@
 // -*-C++-*-
+#version 120
 
 uniform sampler2D texture;