diff --git a/synfig-core/src/modules/mod_geometry/checkerboard.cpp b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
index 09ae4a9..cc597ed 100644
--- a/synfig-core/src/modules/mod_geometry/checkerboard.cpp
+++ b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
@@ -83,7 +83,7 @@ public:
 	rendering::Holder<rendering::TransformationAffine> transformation;
 
 	TaskCheckerBoard(): antialias(true) { }
-	virtual const rendering::Transformation::Handle get_transformation() const
+	virtual rendering::Transformation::Handle get_transformation() const
 		{ return transformation.handle(); }
 };
 
diff --git a/synfig-core/src/synfig/rendering/common/task/taskcontour.h b/synfig-core/src/synfig/rendering/common/task/taskcontour.h
index 2988950..932d129 100644
--- a/synfig-core/src/synfig/rendering/common/task/taskcontour.h
+++ b/synfig-core/src/synfig/rendering/common/task/taskcontour.h
@@ -59,7 +59,7 @@ public:
 
 	virtual Rect calc_bounds() const;
 
-	virtual const Transformation::Handle get_transformation() const
+	virtual Transformation::Handle get_transformation() const
 		{ return transformation.handle(); }
 };
 
diff --git a/synfig-core/src/synfig/rendering/common/task/taskmesh.h b/synfig-core/src/synfig/rendering/common/task/taskmesh.h
index 39c4499..7d57f75 100644
--- a/synfig-core/src/synfig/rendering/common/task/taskmesh.h
+++ b/synfig-core/src/synfig/rendering/common/task/taskmesh.h
@@ -54,7 +54,7 @@ public:
 
 	virtual int get_pass_subtask_index() const
 		{ return sub_task() ? PASSTO_THIS_TASK : PASSTO_NO_TASK; }
-	virtual const Transformation::Handle get_transformation() const
+	virtual Transformation::Handle get_transformation() const
 		{ return transformation.handle(); }
 
 	const Task::Handle& sub_task() const { return Task::sub_task(0); }
diff --git a/synfig-core/src/synfig/rendering/common/task/tasktransformation.h b/synfig-core/src/synfig/rendering/common/task/tasktransformation.h
index 1e05a7c..0b4f0a7 100644
--- a/synfig-core/src/synfig/rendering/common/task/tasktransformation.h
+++ b/synfig-core/src/synfig/rendering/common/task/tasktransformation.h
@@ -54,7 +54,7 @@ class TaskInterfaceTransformation
 {
 public:
 	virtual ~TaskInterfaceTransformation() { }
-	virtual const Transformation::Handle get_transformation() const
+	virtual Transformation::Handle get_transformation() const
 		{ return Transformation::Handle(); }
 };
 
@@ -95,7 +95,7 @@ public:
 
 	Holder<TransformationAffine> transformation;
 
-	virtual const Transformation::Handle get_transformation() const
+	virtual Transformation::Handle get_transformation() const
 		{ return transformation.handle(); }
 
 	virtual int get_pass_subtask_index() const;