diff --git a/Headers/AppKit/NSSpellChecker.h b/Headers/AppKit/NSSpellChecker.h
index 2c8e2317c..d99a92de8 100644
--- a/Headers/AppKit/NSSpellChecker.h
+++ b/Headers/AppKit/NSSpellChecker.h
@@ -81,6 +81,7 @@ enum
 }
 
 + (BOOL)isAutomaticTextReplacementEnabled;
++ (BOOL)isAutomaticDashSubstitutionEnabled;
 
 //
 // Making a Checker available 
diff --git a/Source/NSSpellChecker.m b/Source/NSSpellChecker.m
index 8d169df06..6cac26981 100644
--- a/Source/NSSpellChecker.m
+++ b/Source/NSSpellChecker.m
@@ -167,6 +167,11 @@ static int __documentTag = 0;
   return NO;
 }
 
++ (BOOL)isAutomaticDashSubstitutionEnabled
+{
+  return NO;
+}
+
 //
 // Making a Checker available 
 //