diff --git a/src/gui/EditableWidget.cxx b/src/gui/EditableWidget.cxx
index 7bd6af8d5..16b371813 100644
--- a/src/gui/EditableWidget.cxx
+++ b/src/gui/EditableWidget.cxx
@@ -440,7 +440,7 @@ bool EditableWidget::killChar(int direction, bool addEdit)
   }
   else if(direction == 1)  // Delete next character (delete)
   {
-    if(_caretPos < _editString.size())
+    if(_caretPos < int(_editString.size()))
     {
       if(_selectSize > 0)
         _selectSize--;