diff --git a/Code/Visu/otbImageViewer.txx b/Code/Visu/otbImageViewer.txx
index 4ba222ad86692e6cf1167fafcfb86b2faafccca9..6c7785d4bacb44a41992ec71b25152101a934556 100644
--- a/Code/Visu/otbImageViewer.txx
+++ b/Code/Visu/otbImageViewer.txx
@@ -258,7 +258,7 @@ namespace otb
 
 
 
-	otbMsgDebugMacro("Shrink factor: "<<m_ShrinkFactor);
+	otbMsgDebugMacro(<<"Shrink factor: "<<m_ShrinkFactor);
 	m_Shrink->SetShrinkFactor(m_ShrinkFactor);
 	typedef otb::FltkFilterWatcher WatcherType;
 	WatcherType watcher(m_Shrink,wfull-200,hfull/2,200,20, "Generating Quicklook ...");