diff --git a/rtengine/imageformat.h b/rtengine/imageformat.h
index cd86d536d..22708daef 100644
--- a/rtengine/imageformat.h
+++ b/rtengine/imageformat.h
@@ -29,7 +29,6 @@ typedef enum IIO_Sample_Format {
     //IIOSF_SIGNED_INT         ,    // Not yet supported
     IIOSF_UNSIGNED_CHAR  = 1 << 0,
     IIOSF_UNSIGNED_SHORT = 1 << 1,
-    //IIOSF_HALF               ,    // OpenEXR & NVidia's Half Float, not yet supported
     IIOSF_LOGLUV24       = 1 << 2,
     IIOSF_LOGLUV32       = 1 << 3,
     IIOSF_FLOAT16        = 1 << 4,
diff --git a/rtgui/thumbbrowserbase.cc b/rtgui/thumbbrowserbase.cc
index 814c3e53e..1518428b7 100644
--- a/rtgui/thumbbrowserbase.cc
+++ b/rtgui/thumbbrowserbase.cc
@@ -952,10 +952,6 @@ bool ThumbBrowserBase::Internal::on_motion_notify_event (GdkEventMotion* event)
 bool ThumbBrowserBase::Internal::on_scroll_event (GdkEventScroll* event)
 {
     // Gtk signals automatically acquire the GUI (i.e. this method is enclosed by gdk_thread_enter and gdk_thread_leave)
-
-    printf("ThumbBrowserBase::Internal::on_scroll_event / delta_x=%.5f, delta_y=%.5f, direction=%d, type=%d, send_event=%d\n",
-            event->delta_x, event->delta_y, (int)event->direction, (int)event->type, event->send_event);
-
     parent->scroll (event->direction, event->delta_x, event->delta_y);
     return true;
 }