diff --git a/src/undo/UndoRedoHandler.cpp b/src/undo/UndoRedoHandler.cpp
index f3d3f5a1..ec61f49f 100644
--- a/src/undo/UndoRedoHandler.cpp
+++ b/src/undo/UndoRedoHandler.cpp
@@ -5,7 +5,7 @@
 #include <config.h>
 #include <i18n.h>
 
-#include <stdio.h>
+#include <inttypes.h>
 
 #ifdef UNDO_TRACE
 
@@ -13,11 +13,11 @@ void printAction(UndoAction* action)
 {
 	if (action)
 	{
-		cout << action << " / " << action->getClassName() << endl;
+		g_message("%" PRIu64 " / %s", (uint64_t)action, action->getClassName());
 	}
 	else
 	{
-		cout << "(null)" << endl;
+		g_message("(null)");
 	}
 }
 
@@ -34,12 +34,12 @@ void printUndoList(GList* list)
 
 #ifdef UNDO_TRACE
 #define PRINTCONTENTS()						\
-	cout << "redoList" << endl;				\
+	g_message("redoList");					\
 	printUndoList(this->redoList);			\
-	cout << "undoList" << endl;				\
+	g_message("undoList");					\
 	printUndoList(this->undoList);			\
-	cout << endl << "savedUndo" << endl;	\
-	if(this->savedUndo)						\
+	g_message("savedUndo");					\
+	if (this->savedUndo)					\
 	{										\
 		printAction(this->savedUndo);		\
 	}                                                        
@@ -79,7 +79,7 @@ void UndoRedoHandler::clearContents()
 		UndoAction* action = (UndoAction*) l->data;
 
 #ifdef UNDO_TRACE
-		cout << boost::format("clearContents()::Delete UndoAction: %p / %s") % action % action->getClassName() << endl; //
+		g_message("clearContents()::Delete UndoAction: %" PRIu64 " / %s", (uint64_t)action, action->getClassName());
 #endif //UNDO_TRACE
 
 		delete action;
@@ -104,9 +104,8 @@ void UndoRedoHandler::clearRedo()
 		UndoAction* action = (UndoAction*) l->data;
 
 #ifdef UNDO_TRACE
-		cout << "clearRedo()::Delete UndoAction: " << action
-				<< " / " << action->getClassName() << endl;
-#endif //UNDO_TRACE
+		g_message("clearRedo()::Delete UndoAction: %" PRIu64 " / %s", (uint64_t)action, action->getClassName());
+#endif
 
 		delete action;
 	}
diff --git a/src/view/DocumentView.cpp b/src/view/DocumentView.cpp
index 239b648f..fb65a713 100644
--- a/src/view/DocumentView.cpp
+++ b/src/view/DocumentView.cpp
@@ -370,7 +370,7 @@ void DocumentView::drawLayer(cairo_t* cr, Layer* l)
 	}
 
 #ifdef DEBUG_SHOW_REPAINT_BOUNDS
-	cout << bl::format("DBG:DocumentView: draw {1} / not draw {2}") % drawed % notDrawed << endl;
+	g_message("DBG:DocumentView: draw %i / not draw %i", drawed, notDrawed);
 #endif // DEBUG_SHOW_REPAINT_BOUNDS
 }