diff --git a/src/avrdude/ser_posix.c b/src/avrdude/ser_posix.c
index e2afd1c09..9992f78e3 100644
--- a/src/avrdude/ser_posix.c
+++ b/src/avrdude/ser_posix.c
@@ -90,7 +90,7 @@ static speed_t serial_baud_lookup(long baud)
    * If a non-standard BAUD rate is used, issue
    * a warning (if we are verbose) and return the raw rate
    */
-  avrdude_message(MSG_NOTICE, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
+  avrdude_message(MSG_NOTICE, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld\n",
               progname, baud);
 
   return baud;
@@ -110,7 +110,7 @@ static int ser_setspeed(union filedescriptor *fd, long baud)
    */
   rc = tcgetattr(fd->ifd, &termios);
   if (rc < 0) {
-    avrdude_message(MSG_INFO, "%s: ser_setspeed(): tcgetattr() failed",
+    avrdude_message(MSG_INFO, "%s: ser_setspeed(): tcgetattr() failed\n",
             progname);
     return -errno;
   }
diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 0ed4ec7a6..b14498087 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -789,16 +789,11 @@ void ObjectList::OnContextMenu(wxDataViewEvent&)
 void ObjectList::list_manipulation()
 {
     wxDataViewItem item;
-    wxDataViewColumn* col;
+    wxDataViewColumn* col = nullptr;
     const wxPoint pt = get_mouse_position_in_control();
     HitTest(pt, item, col);
-#ifdef __WXOSX__ // temporary workaround for OSX 
-                 // after Yosemite OS X version, HitTest return undefined item
-    if (!item) item = GetSelection();
-#endif // __WXOSX__
 
-    if (!item) {
-        printf("undefined item\n");
+    if (!item || col == nullptr) {
         return;
     }