diff --git a/plugins/experimental/header_rewrite/conditions.cc b/plugins/experimental/header_rewrite/conditions.cc
index 08994de9c5c..553000e6fe0 100644
--- a/plugins/experimental/header_rewrite/conditions.cc
+++ b/plugins/experimental/header_rewrite/conditions.cc
@@ -238,6 +238,10 @@ ConditionPath::eval(const Resources& res)
 {
   std::string s;
 
+  if (NULL == res._rri) {
+    TSDebug(PLUGIN_NAME, "PATH requires remap initialization! Evaluating to false!");
+    return false;
+  }
   append_value(s, res);
   TSDebug(PLUGIN_NAME, "Evaluating PATH");
 
@@ -270,6 +274,10 @@ ConditionQuery::eval(const Resources& res)
 {
   std::string s;
 
+  if (NULL == res._rri) {
+    TSDebug(PLUGIN_NAME, "QUERY requires remap initialization! Evaluating to false!");
+    return false;
+  }
   append_value(s, res);
   TSDebug(PLUGIN_NAME, "Evaluating QUERY - %s", s.c_str());
   return static_cast<const Matchers<std::string>*>(_matcher)->test(s);