diff --git a/src/osgPlugins/dxf/dxfEntity.cpp b/src/osgPlugins/dxf/dxfEntity.cpp
index 926475868..896e1e131 100644
--- a/src/osgPlugins/dxf/dxfEntity.cpp
+++ b/src/osgPlugins/dxf/dxfEntity.cpp
@@ -18,6 +18,8 @@
 
 #include <osg/io_utils> // just for debugging
 
+#include <algorithm>
+
 using namespace std;
 using namespace osg;
 
diff --git a/src/osgPlugins/txf/TXFFont.cpp b/src/osgPlugins/txf/TXFFont.cpp
index d3cb974c9..bcdb7e45c 100644
--- a/src/osgPlugins/txf/TXFFont.cpp
+++ b/src/osgPlugins/txf/TXFFont.cpp
@@ -15,6 +15,8 @@
 #include <iostream>
 #include <osg/Notify>
 
+#include <algorithm>
+
 #define FNT_BYTE_FORMAT         0
 #define FNT_BITMAP_FORMAT       1