diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 6492b10..346a8b9 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -531,7 +531,22 @@ function _menu_load_objects(&$item, &$map) {
               $args[$i] = &$map;
             }
             if (is_int($arg)) {
-              $args[$i] = isset($path_map[$arg]) ? $path_map[$arg] : '';
+              // If we loaded the specified $arg index in already, supply the
+              // loaded argument. This is the case when e.g. two dynamic
+              // placeholders appear within a single router path, and the
+              // 'load arguments' specify the integer index of the first
+              // argument, in order to pass the loaded argument to the second
+              // argument loader.
+              if (isset($map[$arg])) {
+                $args[$i] = $map[$arg];
+              }
+              // Otherwise, supply the string argument, if any.
+              elseif (isset($path_map[$arg])) {
+                $args[$i] = $path_map[$arg];
+              }
+              else {
+                $args[$i] = '';
+              }
             }
           }
           array_unshift($args, $value);