diff --git a/main/peripherals/Peripheral.hpp b/main/peripherals/Peripheral.hpp
index f88f969c..8f533d0c 100644
--- a/main/peripherals/Peripheral.hpp
+++ b/main/peripherals/Peripheral.hpp
@@ -216,7 +216,7 @@ class PeripheralManager
         } catch (const std::exception& e) {
             Log.error("Failed to create '%s' peripheral '%s' because %s",
                 type.c_str(), name.c_str(), e.what());
-            initJson["error"] = e.what();
+            initJson["error"] = String(e.what());
             return false;
         } catch (...) {
             Log.error("Failed to create '%s' peripheral '%s' because of an unknown exception",