diff --git a/components/terrain/compositemaprenderer.cpp b/components/terrain/compositemaprenderer.cpp
index 6626a5713..f9dae5b2f 100644
--- a/components/terrain/compositemaprenderer.cpp
+++ b/components/terrain/compositemaprenderer.cpp
@@ -6,6 +6,8 @@
 #include <osg/Texture2D>
 #include <osg/RenderInfo>
 
+#include <algorithm>
+
 namespace Terrain
 {