diff --git a/ChangeLog b/ChangeLog
index ad54df83b..cce05906e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -84,6 +84,7 @@
 	  incoming connection
 	* added more detailed instrumentation of the disk I/O thread
 
+	* fixed default values being set incorrectly in add_torrent_params through add_magnet_uri in python bindings
 	* implemented unaligned write (for unbuffered I/O)
 	* fixed broadcast_lsd option
 	* fixed udp-socket race condition when using a proxy
diff --git a/bindings/python/src/magnet_uri.cpp b/bindings/python/src/magnet_uri.cpp
index b68fc6ec3..c072e51b0 100644
--- a/bindings/python/src/magnet_uri.cpp
+++ b/bindings/python/src/magnet_uri.cpp
@@ -39,10 +39,14 @@ namespace {
             std::memcpy(&resume_buf[0], &resume[0], resume.size());
             p.resume_data = &resume_buf;
         }
-        p.storage_mode = extract<storage_mode_t>(params["storage_mode"]);
-        p.paused = params["paused"];
-        p.auto_managed = params["auto_managed"];
-        p.duplicate_is_error = params["duplicate_is_error"];
+        if (params.has_key("storage_mode"))
+            p.storage_mode = extract<storage_mode_t>(params["storage_mode"]);
+        if (params.has_key("paused"))
+            p.paused = params["paused"];
+        if (params.has_key("auto_managed"))
+            p.auto_managed = params["auto_managed"];
+        if (params.has_key("duplicate_is_error"))
+            p.duplicate_is_error = params["duplicate_is_error"];
         
 #ifndef BOOST_NO_EXCEPTIONS
         return add_magnet_uri(s, uri, p);