diff --git a/src/control/Control.cpp b/src/control/Control.cpp
index 134786e5..d8467e67 100644
--- a/src/control/Control.cpp
+++ b/src/control/Control.cpp
@@ -2193,6 +2193,7 @@ bool Control::annotatePdf(Path filename, bool attachPdf, bool attachToDocument)
 
 	getCursor()->setCursorBusy(true);
 
+	this->doc->setFilename("");
 	bool res = this->doc->readPdf(filename, true, attachToDocument);
 
 	if (res)
diff --git a/src/util/Path.cpp b/src/util/Path.cpp
index dbfcfbd7..63a642b0 100644
--- a/src/util/Path.cpp
+++ b/src/util/Path.cpp
@@ -48,6 +48,30 @@ bool Path::operator ==(const Path& other)
 	return this->path == other.path;
 }
 
+/**
+ * Assign path
+ */
+void Path::operator =(const Path& other)
+{
+	this->path = other.path;
+}
+
+/**
+ * Assign path
+ */
+void Path::operator =(const string& path)
+{
+	this->path = path;
+}
+
+/**
+ * Assign path
+ */
+void Path::operator =(const char* path)
+{
+	this->path = path;
+}
+
 /**
  * @return true if this file has .xopp or .xoj extension
  */
diff --git a/src/util/Path.h b/src/util/Path.h
index 782496d3..3d2a5d5b 100644
--- a/src/util/Path.h
+++ b/src/util/Path.h
@@ -41,6 +41,21 @@ public:
 	 */
 	bool operator ==(const Path& other);
 
+	/**
+	 * Assign path
+	 */
+	void operator =(const Path& other);
+
+	/**
+	 * Assign path
+	 */
+	void operator =(const string& path);
+
+	/**
+	 * Assign path
+	 */
+	void operator =(const char* path);
+
 	/**
 	 * Check if the path ends with this extension
 	 *