diff --git a/rtengine/imagedata.cc b/rtengine/imagedata.cc
index 93c6b6604..fd7ed7c6e 100644
--- a/rtengine/imagedata.cc
+++ b/rtengine/imagedata.cc
@@ -276,7 +276,7 @@ void ImageData::extractInfo ()
             }
 
         }
-         else if (root->findTag("MakerNote")) {
+        if (lens == "Unknown" && root->findTag("MakerNote")) {
             rtexif::TagDirectory* mnote = root->findTag("MakerNote")->getDirectory();
 
             if (mnote && !make.compare (0, 5, "NIKON")) {