diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index 1abb006..9710f5b 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -1366,7 +1366,7 @@ bool Value::isIntegral() const {
 #endif
 }
 
-bool Value::isDouble() const { return type_ == realValue || isIntegral(); }
+bool Value::isDouble() const { return type_ == intValue || type_ == uintValue || type_ == realValue; }
 
 bool Value::isNumeric() const { return isDouble(); }