diff --git a/geom/geom/src/TGeoNavigator.cxx b/geom/geom/src/TGeoNavigator.cxx
index a9b3c3c70bef2a7162428f4312ef750a074924f3..f77853b246265ce1401b654890bcd8b5a85447fc 100644
--- a/geom/geom/src/TGeoNavigator.cxx
+++ b/geom/geom/src/TGeoNavigator.cxx
@@ -132,7 +132,7 @@ TGeoNavigator::TGeoNavigator(TGeoManager* geom)
 {
 // Default constructor.
    fThreadId = gGeoManager->ThreadId();
-   printf("Navigator: threadId=%d\n", fThreadId);
+   // printf("Navigator: threadId=%d\n", fThreadId);
    for (Int_t i=0; i<3; i++) {
       fNormal[i] = 0.;
       fCldir[i] = 0.;