diff --git a/src/osg/StateSet.cpp b/src/osg/StateSet.cpp
index b2de97c81..a0f308a2e 100644
--- a/src/osg/StateSet.cpp
+++ b/src/osg/StateSet.cpp
@@ -30,6 +30,7 @@
 #include <osg/TextureRectangle>
 
 #include <set>
+#include <algorithm>
 
 using namespace osg;
 
diff --git a/src/osg/Uniform.cpp b/src/osg/Uniform.cpp
index 317f6c74c..6d12283cc 100644
--- a/src/osg/Uniform.cpp
+++ b/src/osg/Uniform.cpp
@@ -19,6 +19,8 @@
 #include <osg/Program>
 #include <osg/StateSet>
 
+#include <algorithm>
+
 using namespace osg;
 
 ///////////////////////////////////////////////////////////////////////////