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-rw-r--r--oox/source/export/drawingml.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index d8615d79300e..8a8a8b83fb35 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -4863,7 +4863,7 @@ void DrawingML::writeDiagramRels(const uno::Sequence<uno::Sequence<uno::Any>>& x
if (sExtension.equalsIgnoreAsciiCase(".WMF"))
sContentType = "image/x-wmf";
else
- sContentType = "image/" + sExtension.copy(1);
+ sContentType = OUString::Concat("image/") + sExtension.subView(1);
sRelId = sRelId.copy(3);
StreamDataSequence dataSeq;