diff --git a/rtengine/imagedata.cc b/rtengine/imagedata.cc
index 469388b1c..b4058e56e 100644
--- a/rtengine/imagedata.cc
+++ b/rtengine/imagedata.cc
@@ -754,7 +754,8 @@ void set_exif(Exiv2::ExifData &exif, const std::string &key, T val)
 {
     try {
         exif[key] = val;
-    } catch (std::exception &exc) {}
+    } catch (std::exception &exc) {
+    }
 }
 
 } // namespace
@@ -765,10 +766,10 @@ void FramesData::fillBasicTags(Exiv2::ExifData &exif) const
         return;
     }
     set_exif(exif, "Exif.Photo.ISOSpeedRatings", getISOSpeed());
-    set_exif(exif, "Exif.Photo.FNumber", apertureToString(getFNumber()));
-    set_exif(exif, "Exif.Photo.ExposureTime", shutterToString(getShutterSpeed()));
+    set_exif(exif, "Exif.Photo.FNumber", Exiv2::DoubleValue(getFNumber()));
+    set_exif(exif, "Exif.Photo.ExposureTime", Exiv2::DoubleValue(getShutterSpeed()));
     set_exif(exif, "Exif.Photo.FocalLength", Exiv2::DoubleValue(getFocalLen()));
-    set_exif(exif, "Exif.Photo.ExposureBiasValue", expcompToString(getExpComp(), false));
+    set_exif(exif, "Exif.Photo.ExposureBiasValue", Exiv2::DoubleValue(getExpComp()));
     set_exif(exif, "Exif.Image.Make", getMake());
     set_exif(exif, "Exif.Image.Model", getModel());
     set_exif(exif, "Exif.Photo.LensModel", getLens());