diff --git a/src/WebConfig.cpp b/src/WebConfig.cpp
index 9e3a165..bb2846f 100644
--- a/src/WebConfig.cpp
+++ b/src/WebConfig.cpp
@@ -145,7 +145,7 @@ void WebConfig::addDescription(String parameter){
         if (obj.containsKey("name")) strlcpy(_description[_count].name,obj["name"],NAMELENGTH);
         if (obj.containsKey("label"))strlcpy(_description[_count].label,obj["label"],LABELLENGTH);
         if (obj.containsKey("type")) {
-          if (obj["type"].is<char *>()) {
+          if (obj["type"].is<const char *>()) {
             uint8_t t = 0;
             strlcpy(tmp,obj["type"],30);
             while ((t<INPUTTYPES) && (strcmp(tmp,inputtypes[t])!=0)) t++;