diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index 1c74d2e..d55b799 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -67,7 +67,7 @@
 
     def try_open_completions_event(self, event):
         """Happens when it would be nice to open a completion list, but not
-        really neccesary, for example after an dot, so function
+        really necessary, for example after an dot, so function
         calls won't be made.
         """
         lastchar = self.text.get("insert-1c")
@@ -79,7 +79,7 @@
                                          COMPLETE_FILES)
 
     def autocomplete_event(self, event):
-        """Happens when the user wants to complete his word, and if neccesary,
+        """Happens when the user wants to complete his word, and if necessary,
         open a completion list after that (if there is more than one
         completion)
         """
diff --git a/Lib/idlelib/CallTips.py b/Lib/idlelib/CallTips.py
index 7bcc1e2..bd51b7f 100644
--- a/Lib/idlelib/CallTips.py
+++ b/Lib/idlelib/CallTips.py
@@ -51,7 +51,7 @@
 
     def try_open_calltip_event(self, event):
         """Happens when it would be nice to open a CallTip, but not really
-        neccesary, for example after an opening bracket, so function calls
+        necessary, for example after an opening bracket, so function calls
         won't be made.
         """
         self.open_calltip(False)
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 297dd31..96a138b 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -310,7 +310,7 @@
   window raising, especially in the Windows menu and in the debugger.
   IDLEfork 763524.
 
-- If user passes a non-existant filename on the commandline, just
+- If user passes a non-existent filename on the commandline, just
   open a new file, don't raise a dialog.  IDLEfork 854928.