diff --git a/eeschema/sch_component.cpp b/eeschema/sch_component.cpp
index 8fbe1076ed..29e0641216 100644
--- a/eeschema/sch_component.cpp
+++ b/eeschema/sch_component.cpp
@@ -522,8 +522,8 @@ void SCH_COMPONENT::SetTimeStamp( long aNewTimeStamp )
 {
     wxString string_timestamp, string_oldtimestamp;
 
-    string_timestamp.Printf( wxT( "%8.8X" ), aNewTimeStamp );
-    string_oldtimestamp.Printf( wxT( "%8.8X" ), m_TimeStamp );
+    string_timestamp.Printf( wxT( "%08lX" ), aNewTimeStamp );
+    string_oldtimestamp.Printf( wxT( "%08lX" ), m_TimeStamp );
     EDA_ITEM::SetTimeStamp( aNewTimeStamp );
 
     for( unsigned ii = 0; ii < m_PathsAndReferences.GetCount(); ii++ )
diff --git a/pcbnew/class_track.cpp b/pcbnew/class_track.cpp
index 1365d0e98c..743a9f2f19 100644
--- a/pcbnew/class_track.cpp
+++ b/pcbnew/class_track.cpp
@@ -164,7 +164,7 @@ wxString SEGZONE::GetSelectMenuText() const
     NETINFO_ITEM* net;
     BOARD* board = GetBoard();
 
-    text << _( "Zone" ) << wxT( " " ) << wxString::Format( wxT( "(%8.8X)" ), m_TimeStamp );
+    text << _( "Zone" ) << wxT( " " ) << wxString::Format( wxT( "(%08lX)" ), m_TimeStamp );
 
     if( board )
     {
diff --git a/pcbnew/class_zone.cpp b/pcbnew/class_zone.cpp
index 069bddfaef..3db2535d83 100644
--- a/pcbnew/class_zone.cpp
+++ b/pcbnew/class_zone.cpp
@@ -697,7 +697,7 @@ void ZONE_CONTAINER::DisplayInfo( EDA_DRAW_FRAME* frame )
     msg = board->GetLayerName( m_Layer );
     frame->AppendMsgPanel( _( "Layer" ), msg, BROWN );
 
-    msg.Printf( wxT( "%d" ), m_Poly->corner.size() );
+    msg.Printf( wxT( "%d" ), (int) m_Poly->corner.size() );
     frame->AppendMsgPanel( _( "Corners" ), msg, BLUE );
 
     if( m_FillMode )
@@ -708,12 +708,12 @@ void ZONE_CONTAINER::DisplayInfo( EDA_DRAW_FRAME* frame )
     frame->AppendMsgPanel( _( "Fill mode" ), msg, BROWN );
 
     // Useful for statistics :
-    msg.Printf( wxT( "%d" ), m_Poly->m_HatchLines.size() );
+    msg.Printf( wxT( "%d" ), (int) m_Poly->m_HatchLines.size() );
     frame->AppendMsgPanel( _( "Hatch lines" ), msg, BLUE );
 
     if( m_FilledPolysList.size() )
     {
-        msg.Printf( wxT( "%d" ), m_FilledPolysList.size() );
+        msg.Printf( wxT( "%d" ), (int) m_FilledPolysList.size() );
         frame->AppendMsgPanel( _( "Corners in DrawList" ), msg, BLUE );
     }
 }
@@ -897,7 +897,7 @@ wxString ZONE_CONTAINER::GetSelectMenuText() const
         text << wxT( " " ) << _( "(Cutout)" );
 
     text << wxT( " " );
-    text << wxString::Format( wxT( "(%8.8X)" ), m_TimeStamp );
+    text << wxString::Format( wxT( "(%08lX)" ), m_TimeStamp );
 
     if ( !IsOnCopperLayer() )
     {
diff --git a/pcbnew/zones_test_and_combine_areas.cpp b/pcbnew/zones_test_and_combine_areas.cpp
index 670ac19817..fb6d206d08 100644
--- a/pcbnew/zones_test_and_combine_areas.cpp
+++ b/pcbnew/zones_test_and_combine_areas.cpp
@@ -281,7 +281,7 @@ int BOARD::ClipAreaPolygon( PICKED_ITEMS_LIST * aNewZonesList,
         if( bMessageBoxArc && bDontShowSelfIntersectionArcsWarning == false )
         {
             wxString str;
-            str.Printf( wxT( "Area %8.8X of net \"%s\" has arcs intersecting other sides.\n" ),
+            str.Printf( wxT( "Area %08lX of net \"%s\" has arcs intersecting other sides.\n" ),
                         aCurrArea->GetTimeStamp(), GetChars( aCurrArea->m_Netname ) );
             str += wxT( "This may cause problems with other editing operations,\n" );
             str += wxT( "such as adding cutouts. It can't be fixed automatically.\n" );
@@ -304,7 +304,7 @@ int BOARD::ClipAreaPolygon( PICKED_ITEMS_LIST * aNewZonesList,
         if( bMessageBoxInt && bDontShowSelfIntersectionWarning == false )
         {
             wxString str;
-            str.Printf( wxT( "Area %8.8X of net \"%s\" is self-intersecting and will be clipped.\n" ),
+            str.Printf( wxT( "Area %08lX of net \"%s\" is self-intersecting and will be clipped.\n" ),
                         aCurrArea->GetTimeStamp(), GetChars( aCurrArea->m_Netname ) );
             str += wxT( "This may result in splitting the area.\n" );
             str += wxT( "If the area is complex, this may take a few seconds." );