Index: D:/Work/maven/comp-2.0.x/maven-artifact-manager/src/main/java/org/apache/maven/artifact/manager/DefaultWagonManager.java
===================================================================
--- D:/Work/maven/comp-2.0.x/maven-artifact-manager/src/main/java/org/apache/maven/artifact/manager/DefaultWagonManager.java	(revision 377182)
+++ D:/Work/maven/comp-2.0.x/maven-artifact-manager/src/main/java/org/apache/maven/artifact/manager/DefaultWagonManager.java	(working copy)
@@ -604,7 +604,13 @@
 
     public ProxyInfo getProxy( String protocol )
     {
-        return (ProxyInfo) proxies.get( protocol );
+        ProxyInfo proxy = (ProxyInfo) proxies.get(protocol);
+        /* If no proxy is specified for the https protocol, 
+         * search a proxy for the http protocol. */
+        if (proxy == null && "https".equals(protocol)) {
+            proxy = (ProxyInfo) proxies.get("http");
+        }
+        return proxy;
     }
 
     public AuthenticationInfo getAuthenticationInfo( String id )