diff --git a/include/osg/Array b/include/osg/Array
index 623cb96e6..6f64e8b86 100644
--- a/include/osg/Array
+++ b/include/osg/Array
@@ -185,7 +185,7 @@ class TemplateArray : public Array, public MixinVector<T>
             Array(ARRAYTYPE,DataSize,DataType),
             MixinVector<T>(no) {}
 
-        TemplateArray(unsigned int no,T* ptr) : 
+        TemplateArray(unsigned int no,const T* ptr) : 
             Array(ARRAYTYPE,DataSize,DataType),
             MixinVector<T>(ptr,ptr+no) {}