4 files changed, 4 insertions, 4 deletions
diff --git a/src/xml/comment-node.h b/src/xml/comment-node.h
index b804a00d9..4be09ec85 100644
--- a/src/xml/comment-node.h
+++ b/src/xml/comment-node.h
@@ -32,7 +32,7 @@ struct CommentNode : public SimpleNode {
     Inkscape::XML::NodeType type() const { return Inkscape::XML::COMMENT_NODE; }
 
 protected:
-    SimpleNode *_duplicate(Document* doc) const { return new CommentNode(*this); }
+    SimpleNode *_duplicate(Document* /*doc*/) const { return new CommentNode(*this); }
 };
 
 }
diff --git a/src/xml/element-node.h b/src/xml/element-node.h
index 4bac55f83..1b79910a8 100644
--- a/src/xml/element-node.h
+++ b/src/xml/element-node.h
@@ -29,7 +29,7 @@ public:
     Inkscape::XML::NodeType type() const { return Inkscape::XML::ELEMENT_NODE; }
 
 protected:
-    SimpleNode *_duplicate(Document* doc) const { return new ElementNode(*this); }
+    SimpleNode *_duplicate(Document* /*doc*/) const { return new ElementNode(*this); }
 };
 
 }
diff --git a/src/xml/pi-node.h b/src/xml/pi-node.h
index c3f84b636..b89ef25a0 100644
--- a/src/xml/pi-node.h
+++ b/src/xml/pi-node.h
@@ -32,7 +32,7 @@ struct PINode : public SimpleNode {
     Inkscape::XML::NodeType type() const { return Inkscape::XML::PI_NODE; }
 
 protected:
-    SimpleNode *_duplicate(Document* doc) const { return new PINode(*this); }
+    SimpleNode *_duplicate(Document* /*doc*/) const { return new PINode(*this); }
 };
 
 }
diff --git a/src/xml/text-node.h b/src/xml/text-node.h
index 36f638ad9..adcacb604 100644
--- a/src/xml/text-node.h
+++ b/src/xml/text-node.h
@@ -32,7 +32,7 @@ struct TextNode : public SimpleNode {
     Inkscape::XML::NodeType type() const { return Inkscape::XML::TEXT_NODE; }
 
 protected:
-    SimpleNode *_duplicate(Document* doc) const { return new TextNode(*this); }
+    SimpleNode *_duplicate(Document* /*doc*/) const { return new TextNode(*this); }
 };
 
 }