diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index d3c496f..9710f5b 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -1279,7 +1279,11 @@ bool Value::isBool() const { return type_ == booleanValue; }
 bool Value::isInt() const {
   switch (type_) {
   case intValue:
+#if defined(JSON_HAS_INT64)
     return value_.int_ >= minInt && value_.int_ <= maxInt;
+#else
+    return true;
+#endif
   case uintValue:
     return value_.uint_ <= UInt(maxInt);
   case realValue:
@@ -1294,9 +1298,17 @@ bool Value::isInt() const {
 bool Value::isUInt() const {
   switch (type_) {
   case intValue:
+#if defined(JSON_HAS_INT64)
     return value_.int_ >= 0 && LargestUInt(value_.int_) <= LargestUInt(maxUInt);
+#else
+    return value_.int_ >= 0;
+#endif
   case uintValue:
+#if defined(JSON_HAS_INT64)
     return value_.uint_ <= maxUInt;
+#else
+    return true;
+#endif
   case realValue:
     return value_.real_ >= 0 && value_.real_ <= maxUInt &&
            IsIntegral(value_.real_);
@@ -1354,9 +1366,9 @@ 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 isIntegral() || isDouble(); }
+bool Value::isNumeric() const { return isDouble(); }
 
 bool Value::isString() const { return type_ == stringValue; }