diff --git a/src/json.h b/src/json.h
index a524255ef..8c38ec40a 100644
--- a/src/json.h
+++ b/src/json.h
@@ -47,6 +47,7 @@ namespace json {
                 case QVariant::LongLong:
                 case QVariant::UInt:
                 case QVariant::ULongLong:
+                case QMetaType::Float:
       return v.value<QString>();
                 case QVariant::String:
       {