diff --git a/pcbnew/dialogs/dialog_position_relative_base.cpp b/pcbnew/dialogs/dialog_position_relative_base.cpp
index 7d2b160eeb..fb3116e362 100644
--- a/pcbnew/dialogs/dialog_position_relative_base.cpp
+++ b/pcbnew/dialogs/dialog_position_relative_base.cpp
@@ -103,6 +103,8 @@ DIALOG_POSITION_RELATIVE_BASE::DIALOG_POSITION_RELATIVE_BASE( wxWindow* parent,
 	bSizerBottom = new wxBoxSizer( wxHORIZONTAL );
 	
 	m_select_anchor_button = new wxButton( this, wxID_ANY, _("Select Anchor Position"), wxDefaultPosition, wxDefaultSize, 0 );
+	m_select_anchor_button->SetToolTip( _("Click and select a board item.\nThe anchor position will be the position of the selected item.") );
+	
 	bSizerBottom->Add( m_select_anchor_button, 0, wxALL, 5 );
 	
 	
diff --git a/pcbnew/dialogs/dialog_position_relative_base.fbp b/pcbnew/dialogs/dialog_position_relative_base.fbp
index 0c28c12aad..6ed793bdb5 100644
--- a/pcbnew/dialogs/dialog_position_relative_base.fbp
+++ b/pcbnew/dialogs/dialog_position_relative_base.fbp
@@ -1890,7 +1890,7 @@
                                 <property name="style"></property>
                                 <property name="subclass"></property>
                                 <property name="toolbar_pane">0</property>
-                                <property name="tooltip"></property>
+                                <property name="tooltip">Click and select a board item.&#x0A;The anchor position will be the position of the selected item.</property>
                                 <property name="validator_data_type"></property>
                                 <property name="validator_style">wxFILTER_NONE</property>
                                 <property name="validator_type">wxDefaultValidator</property>