diff --git a/ChangeLog b/ChangeLog
index 033f6d31c..ec34a0d01 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2020-07-20 Gregory John Casamento <greg.casamento@gmail.com>
+
+	* Source/NSAlert.m: Fix NSAlert to have an OK button if none other
+        is specified.  This appears to be the default behavior at this point
+        according to testing on macOS.
+
 2020-07-19 Gregory John Casamento <greg.casamento@gmail.com>
 
 	* Headers/AppKit/AppKit.h: Add include files for NSSegue* and other
diff --git a/Source/NSAlert.m b/Source/NSAlert.m
index 68bc15fb6..1b2a32b3e 100644
--- a/Source/NSAlert.m
+++ b/Source/NSAlert.m
@@ -2005,6 +2005,10 @@ void NSBeginInformationalAlertSheet(NSString *title,
              icon: _icon
              title: _message_text != nil ? _message_text : _(@"Alert")
 	     message: _informative_text != nil ? _informative_text : _(@"No information")];
+      if ([_buttons count] == 0)
+        {
+          [self addButtonWithTitle: @"OK"];
+        }
       [panel setButtons: _buttons];
     }
 }