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-rw-r--r--src/sp-shape.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sp-shape.cpp b/src/sp-shape.cpp
index f807caf29..56589bab9 100644
--- a/src/sp-shape.cpp
+++ b/src/sp-shape.cpp
@@ -600,7 +600,7 @@ sp_shape_marker_get_transform(SPShape const *shape, NArtBpath const *bp)
* determined, the slope is assumed to be zero.)
*/
Geom::Matrix
-sp_shape_marker_get_transform(Geom::Point p, Geom::Point t1, Geom::Point t2)
+sp_shape_marker_get_transform(Geom::Point & p, Geom::Point & t1, Geom::Point & t2)
{
double const angle1 = Geom::atan2(t1);
double const angle2 = Geom::atan2(t2);