--- modules/cache/mod_mem_cache.c	(revision 704565)
+++ modules/cache/mod_mem_cache.c	(working copy)
@@ -614,6 +614,12 @@ 
                        ap_make_content_type(r, r->content_type));
     }
 
+    if (!apr_table_get(headers_out, "Content-Encoding")
+        && r->content_encoding) {
+        apr_table_setn(headers_out, "Content-Encoding",
+                       r->content_encoding);
+    }
+
     headers_out = apr_table_overlay(r->pool, headers_out, r->err_headers_out);
     mobj->header_out = deep_table_copy(mobj->pool, headers_out);
 
--- modules/cache/mod_disk_cache.c	(revision 704565)
+++ modules/cache/mod_disk_cache.c	(working copy)
@@ -916,6 +916,12 @@ 
                            ap_make_content_type(r, r->content_type));
         }
 
+        if (!apr_table_get(headers_out, "Content-Encoding")
+            && r->content_encoding) {
+            apr_table_setn(headers_out, "Content-Encoding",
+                           r->content_encoding);
+        }
+
         headers_out = apr_table_overlay(r->pool, headers_out,
                                         r->err_headers_out);
         rv = store_table(dobj->hfd, headers_out);