diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index df535f80de77..b5ef21f8b190 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -849,7 +849,7 @@ OUString DrawingML::WriteImage( const Graphic& rGraphic , bool bRelPathToMedia )
             pExtension = ".png";
             break;
         case GFX_LINK_TYPE_NATIVE_TIF:
-            sMediaType = "image/tif";
+            sMediaType = "image/tiff";
             pExtension = ".tif";
             break;
         case GFX_LINK_TYPE_NATIVE_WMF:
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
index 3df813eb2ade..0d45a4997a50 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
@@ -209,7 +209,7 @@ DECLARE_OOXMLEXPORT_TEST(testContentTypeTIF, "fdo77476.docx")
     if (!pXmlDoc)
        return;
 
-    assertXPath(pXmlDoc, "/ContentType:Types/ContentType:Override[@ContentType='image/tif']", "PartName", "/word/media/image1.tif");
+    assertXPath(pXmlDoc, "/ContentType:Types/ContentType:Override[@ContentType='image/tiff']", "PartName", "/word/media/image1.tif");
 }
 
 DECLARE_OOXMLEXPORT_TEST(testFDO77117, "fdo77117.docx")