diff --git a/rtengine/dynamicprofile.cc b/rtengine/dynamicprofile.cc
index 380af29be..5ac408da5 100644
--- a/rtengine/dynamicprofile.cc
+++ b/rtengine/dynamicprofile.cc
@@ -246,8 +246,12 @@ bool DynamicProfileRules::storeRules()
     return kf.save_to_file (Glib::build_filename (Options::rtdir, "dynamicprofile.cfg"));
 }
 
-const std::vector<DynamicProfileRule> &DynamicProfileRules::getRules() const
+const std::vector<DynamicProfileRule> &DynamicProfileRules::getRules()
 {
+    if (!rulesLoaded) {
+        loadRules();
+    }
+
     return dynamicRules;
 }
 
diff --git a/rtengine/dynamicprofile.h b/rtengine/dynamicprofile.h
index b59838e3f..cfe46d9ba 100644
--- a/rtengine/dynamicprofile.h
+++ b/rtengine/dynamicprofile.h
@@ -72,7 +72,7 @@ protected:
 public:
     bool loadRules();
     bool storeRules();
-    const std::vector<DynamicProfileRule> &getRules() const;
+    const std::vector<DynamicProfileRule> &getRules();
     void setRules (const std::vector<DynamicProfileRule> &r);
 };