diff --git a/src/include/OpenImageIO/imagebufalgo.h b/src/include/OpenImageIO/imagebufalgo.h
index f621845d6b..506d4b7634 100644
--- a/src/include/OpenImageIO/imagebufalgo.h
+++ b/src/include/OpenImageIO/imagebufalgo.h
@@ -2270,6 +2270,10 @@ enum MakeTextureMode {
 ///                           Semicolon-separated list of alternate images
 ///                           to be used for individual MIPmap levels,
 ///                           rather than simply downsizing. (default: "")
+///    - `maketx:mipmap_metadata` (int) :
+///                           If nonzero, will propagate metadata to every MIP
+///                           level. The default (0) only writes metadata to
+///                           the highest-resolution level. (0)
 ///    - `maketx:full_command_line` (string) :
 ///                           The command or program used to generate this
 ///                           call, will be embedded in the metadata.
diff --git a/src/libOpenImageIO/maketexture.cpp b/src/libOpenImageIO/maketexture.cpp
index 1f708889de..ea06c16a08 100644
--- a/src/libOpenImageIO/maketexture.cpp
+++ b/src/libOpenImageIO/maketexture.cpp
@@ -757,7 +757,9 @@ write_mipmap(ImageBufAlgo::MakeTextureMode mode, std::shared_ptr<ImageBuf>& img,
                 mipimages.erase(mipimages.begin());
             } else {
                 // Resize a factor of two smaller
-                smallspec        = outspec;
+                smallspec = outspec;
+                if (!configspec.get_int_attribute("maketx:mipmap_metadata"))
+                    smallspec.extra_attribs.free();
                 smallspec.width  = img->spec().width;
                 smallspec.height = img->spec().height;
                 smallspec.depth  = img->spec().depth;