diff --git a/src/lib/libkrbn/include/libkrbn/libkrbn.h b/src/lib/libkrbn/include/libkrbn/libkrbn.h
index b3bc1b35c..9e6ca79d2 100644
--- a/src/lib/libkrbn/include/libkrbn/libkrbn.h
+++ b/src/lib/libkrbn/include/libkrbn/libkrbn.h
@@ -140,6 +140,10 @@ void libkrbn_core_configuration_replace_selected_profile_fn_function_key(libkrbn
 
 size_t libkrbn_core_configuration_get_selected_profile_complex_modifications_rules_size(libkrbn_core_configuration* p);
 const char* libkrbn_core_configuration_get_selected_profile_complex_modifications_rule_description(libkrbn_core_configuration* p, size_t index);
+bool libkrbn_core_configuration_get_selected_profile_complex_modifications_rule_json_string(libkrbn_core_configuration* p,
+                                                                                            size_t index,
+                                                                                            char* buffer,
+                                                                                            size_t length);
 void libkrbn_core_configuration_erase_selected_profile_complex_modifications_rule(libkrbn_core_configuration* p, size_t index);
 void libkrbn_core_configuration_swap_selected_profile_complex_modifications_rules(libkrbn_core_configuration* p, size_t index1, size_t index2);
 void libkrbn_core_configuration_move_selected_profile_complex_modifications_rule(libkrbn_core_configuration* p, size_t source_index, size_t destination_index);
diff --git a/src/lib/libkrbn/src/libkrbn_configuration.cpp b/src/lib/libkrbn/src/libkrbn_configuration.cpp
index 8f2334a36..17079259d 100644
--- a/src/lib/libkrbn/src/libkrbn_configuration.cpp
+++ b/src/lib/libkrbn/src/libkrbn_configuration.cpp
@@ -337,6 +337,24 @@ const char* _Nullable libkrbn_core_configuration_get_selected_profile_complex_mo
   return 0;
 }
 
+bool libkrbn_core_configuration_get_selected_profile_complex_modifications_rule_json_string(libkrbn_core_configuration* p,
+                                                                                            size_t index,
+                                                                                            char* buffer,
+                                                                                            size_t length) {
+  if (auto c = reinterpret_cast<libkrbn_core_configuration_class*>(p)) {
+    const auto& rules = c->get_core_configuration().get_selected_profile().get_complex_modifications().get_rules();
+    if (index < rules.size()) {
+      auto json_string = krbn::json_utility::dump(rules[index].get_json());
+      // Return false if no enough space.
+      if (json_string.length() < length) {
+        strlcpy(buffer, json_string.c_str(), length);
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 int libkrbn_core_configuration_get_selected_profile_complex_modifications_parameter(libkrbn_core_configuration* p,
                                                                                     const char* name) {
   if (auto c = reinterpret_cast<libkrbn_core_configuration_class*>(p)) {