diff --git a/Effects/terrain-overlay.eff b/Effects/terrain-overlay.eff
index ebc82e794..609856eae 100644
--- a/Effects/terrain-overlay.eff
+++ b/Effects/terrain-overlay.eff
@@ -71,9 +71,9 @@
GL_ARB_shading_language_100
GL_ARB_vertex_shader
GL_ARB_fragment_shader
- GL_EXT_geometry_shader4
+ GL_EXT_geometry_shader4