diff --git a/synfig-core/src/synfig/valuenodes/valuenode_bone.cpp b/synfig-core/src/synfig/valuenodes/valuenode_bone.cpp
index 3e2537efea1..12889ef9bab 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_bone.cpp
+++ b/synfig-core/src/synfig/valuenodes/valuenode_bone.cpp
@@ -1007,7 +1007,7 @@ ValueNode_Bone_Root::~ValueNode_Bone_Root()
 }
 
 ValueBase
-ValueNode_Bone_Root::operator()(Time t)const
+ValueNode_Bone_Root::operator()(Time /*t*/)const
 {
 	Bone ret;
 	ret.set_name			(get_local_name());
@@ -1032,7 +1032,7 @@ ValueNode_Bone_Root::set_root_canvas(etl::loose_handle<Canvas> canvas)
 }
 
 ValueNode_Bone*
-ValueNode_Bone_Root::create(const ValueBase& x, etl::loose_handle<Canvas>)
+ValueNode_Bone_Root::create(const ValueBase& /*x*/, etl::loose_handle<Canvas>)
 {
 	return get_root_bone().get();
 }
@@ -1040,7 +1040,7 @@ ValueNode_Bone_Root::create(const ValueBase& x, etl::loose_handle<Canvas>)
 
 
 String
-ValueNode_Bone_Root::get_bone_name(Time t)const
+ValueNode_Bone_Root::get_bone_name(Time /*t*/)const
 {
 	return get_local_name();
 }
@@ -1059,13 +1059,13 @@ ValueNode_Bone_Root::create_new()const
 }
 
 Matrix
-ValueNode_Bone_Root::get_animated_matrix(Time t, Point child_origin)const
+ValueNode_Bone_Root::get_animated_matrix(Time /*t*/, Point child_origin)const
 {
 	return Matrix().set_translate(child_origin);
 }
 
 bool
-ValueNode_Bone_Root::check_type(Type &type)
+ValueNode_Bone_Root::check_type(Type &/*type*/)
 {
 	return false;
 }
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.cpp b/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.cpp
index bf21af4a2ba..aa5c7630d36 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.cpp
+++ b/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.cpp
@@ -95,7 +95,7 @@ ValueNode_BoneInfluence::ValueNode_BoneInfluence(const ValueNode::Handle &x, Can
 }
 
 ValueNode_BoneInfluence*
-ValueNode_BoneInfluence::create(const ValueBase& x, Canvas::LooseHandle canvas, etl::loose_handle<Canvas>)
+ValueNode_BoneInfluence::create(const ValueBase& x, Canvas::LooseHandle canvas)
 {
 	if (x.get_type() == type_bline_point)
 		return new ValueNode_BoneInfluence(ValueNode_Composite::create(x, canvas), canvas);
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.h b/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.h
index 6043e104533..365b87f8541 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.h
+++ b/synfig-core/src/synfig/valuenodes/valuenode_boneinfluence.h
@@ -54,7 +54,7 @@ class ValueNode_BoneInfluence : public LinkableValueNode
 	typedef etl::handle<ValueNode_BoneInfluence> Handle;
 	typedef etl::handle<const ValueNode_BoneInfluence> ConstHandle;
 
-	static ValueNode_BoneInfluence* create(const ValueBase& x, etl::loose_handle<Canvas>, etl::loose_handle<Canvas> canvas=nullptr);
+	static ValueNode_BoneInfluence* create(const ValueBase& x, etl::loose_handle<Canvas> canvas);
 	virtual ~ValueNode_BoneInfluence();
 
 	virtual ValueBase operator()(Time t) const override;
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.cpp b/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.cpp
index aadd9e84649..a6c0ae7acec 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.cpp
+++ b/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.cpp
@@ -91,7 +91,7 @@ ValueNode_BoneWeightPair::create_new()const
 }
 
 ValueNode_BoneWeightPair*
-ValueNode_BoneWeightPair::create(const ValueBase& x, Canvas::LooseHandle canvas, etl::loose_handle<Canvas>)
+ValueNode_BoneWeightPair::create(const ValueBase& x, Canvas::LooseHandle canvas)
 {
 	return new ValueNode_BoneWeightPair(x, canvas);
 }
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.h b/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.h
index eb7689284dc..8ab86eb31fa 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.h
+++ b/synfig-core/src/synfig/valuenodes/valuenode_boneweightpair.h
@@ -51,7 +51,7 @@ class ValueNode_BoneWeightPair : public LinkableValueNode
 	typedef etl::handle<ValueNode_BoneWeightPair> Handle;
 	typedef etl::handle<const ValueNode_BoneWeightPair> ConstHandle;
 
-	static ValueNode_BoneWeightPair* create(const ValueBase& x, etl::loose_handle<Canvas>, etl::loose_handle<Canvas> canvas=nullptr);
+	static ValueNode_BoneWeightPair* create(const ValueBase& x, etl::loose_handle<Canvas> canvas);
 	virtual ~ValueNode_BoneWeightPair();
 
 	virtual ValueBase operator()(Time t) const override;
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_duplicate.cpp b/synfig-core/src/synfig/valuenodes/valuenode_duplicate.cpp
index ae25e512ebe..3eab0cdda1d 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_duplicate.cpp
+++ b/synfig-core/src/synfig/valuenodes/valuenode_duplicate.cpp
@@ -161,7 +161,7 @@ ValueNode_Duplicate::count_steps(Time t)const
 }
 
 ValueBase
-ValueNode_Duplicate::operator()(Time t)const
+ValueNode_Duplicate::operator()(Time /*t*/)const
 {
 	if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
 		printf("%s:%d operator()\n", __FILE__, __LINE__);
@@ -172,7 +172,7 @@ ValueNode_Duplicate::operator()(Time t)const
 
 
 bool
-ValueNode_Duplicate::check_type(Type &type)
+ValueNode_Duplicate::check_type(Type &/*type*/)
 {
 	// never offer this as a choice.  it's used automatically by the 'Duplicate' layer.
 	return false;
diff --git a/synfig-core/src/synfig/valuenodes/valuenode_timeloop.cpp b/synfig-core/src/synfig/valuenodes/valuenode_timeloop.cpp
index 8373f9f8d62..a7303bffc56 100644
--- a/synfig-core/src/synfig/valuenodes/valuenode_timeloop.cpp
+++ b/synfig-core/src/synfig/valuenodes/valuenode_timeloop.cpp
@@ -187,7 +187,7 @@ ValueNode_TimeLoop::get_children_vocab_vfunc()const
 	return ret;
 }
 
-LinkableValueNode::InvertibleStatus ValueNode_TimeLoop::is_invertible(const Time& t, const ValueBase& target_value, int* link_index) const
+LinkableValueNode::InvertibleStatus ValueNode_TimeLoop::is_invertible(const Time& /*t*/, const ValueBase& target_value, int* link_index) const
 {
 	if (target_value.get_type() != get_link("link")->get_type())
 		return INVERSE_ERROR_BAD_TYPE;