diff --git a/include/osg/Texture2D b/include/osg/Texture2D
index ea409764c..d06baacc3 100644
--- a/include/osg/Texture2D
+++ b/include/osg/Texture2D
@@ -135,10 +135,6 @@ class OSG_EXPORT Texture2D : public Texture
         void allocateMipmap(State& state) const;
 
 
-        /** It's not ideal that _image is mutable, but it's required since
-          * Image::ensureDimensionsArePowerOfTwo() can only be called in a
-          * valid OpenGL context, and therefore within Texture::apply, which
-          * is const. */
         ref_ptr<Image> _image;
 
         /** Subloaded images can have different texture and image sizes. */
diff --git a/include/osg/TextureRectangle b/include/osg/TextureRectangle
index b9d50aaa6..7afc73296 100644
--- a/include/osg/TextureRectangle
+++ b/include/osg/TextureRectangle
@@ -134,11 +134,7 @@ class OSG_EXPORT TextureRectangle : public Texture
         void applyTexImage_load(GLenum target, Image* image, State& state, GLsizei& inwidth, GLsizei& inheight) const;
         void applyTexImage_subload(GLenum target, Image* image, State& state, GLsizei& inwidth, GLsizei& inheight, GLint& inInternalFormat) const;
 
-        // not ideal that _image is mutable, but it's required since
-        // Image::ensureDimensionsArePowerOfTwo() can only be called
-        // in a valid OpenGL context, and therefore within an Texture::apply
-        // which is const...
-        mutable ref_ptr<Image> _image;
+        ref_ptr<Image> _image;
 
         // subloaded images can have different texture and image sizes.
         mutable GLsizei _textureWidth, _textureHeight;