diff --git a/ChangeLog b/ChangeLog
index fa09d90c0..5a2372182 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-03-10  Adam Fedor  <fedor@mallory>
+
+	* Source/NSURLProtocol.m ([_NSHTTPURLProtocol -stream:stream:event]): 
+	Add default Content-Type to POST methods if none is present.
+
 2010-03-09  Adam Fedor  <fedor@gnu.org>
 
 	* Source/NSHTTPCookie.m: Finish off implementation
diff --git a/Source/NSURLProtocol.m b/Source/NSURLProtocol.m
index 04af85c44..79d578a6e 100644
--- a/Source/NSURLProtocol.m
+++ b/Source/NSURLProtocol.m
@@ -1304,6 +1304,12 @@ static NSURLProtocol	*placeholder = nil;
 		  [m appendString: [d objectForKey: s]];
 		  [m appendString: @"\r\n"];
 		}
+	      if ([[this->request HTTPMethod] isEqual: @"POST"]
+		  && [d objectForKey: @"Content-Type"] == nil)
+		{
+		  /* On MacOSX, this is automatically added to POST methods */
+		  [m appendString: @"Content-Type: application/x-www-form-urlencoded\r\n"];
+		}
 	      if ([this->request valueForHTTPHeaderField: @"Host"] == nil)
 		{
 		  id	p = [u port];