diff --git a/src/main.cpp b/src/main.cpp
index e2e58e52e..b2a4a391e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -88,7 +88,7 @@ void setup()
 
     // Load PinMapping
     MessageOutput.print("Reading PinMapping... ");
-    if (PinMapping.init(String(Configuration.get().Dev_PinMapping))) {
+    if (PinMapping.init(Configuration.get().Dev_PinMapping)) {
         MessageOutput.print("found valid mapping ");
     } else {
         MessageOutput.print("using default config ");