diff --git a/uppsrc/TCore/CalcNode.cpp b/uppsrc/TCore/CalcNode.cpp
index 45ab11e02..3a256331d 100644
--- a/uppsrc/TCore/CalcNode.cpp
+++ b/uppsrc/TCore/CalcNode.cpp
@@ -613,6 +613,12 @@ int CalcContext::EvaluateInt(String expr)
 	return !!node ? node->CalcInt(*this) : int(Null);
 }
 
+int64 CalcContext::EvaluateInt64(String expr)
+{
+	CalcNodePtr node = CalcParser().ScanVoid(expr);
+	return !!node ? node->CalcInt64(*this) : int(Null);
+}
+
 Date CalcContext::EvaluateDate(String expr)
 {
 	CalcNodePtr node = CalcParser().ScanVoid(expr);
@@ -1047,6 +1053,16 @@ int CalcNode::CalcInt(CalcContext& context) const
 	return v;
 }
 
+int64 CalcNode::CalcInt64(CalcContext& context) const
+{
+	if(this == 0)
+		return Null;
+	Value v = Calc(context);
+	if(!IsNull(v) && !IsNumber(v))
+		throw Exc(t_("Number expected, found: ") + context.FormatNull(v));
+	return v;
+}
+
 Date CalcNode::CalcDate(CalcContext& context) const
 {
 	if(this == 0)
diff --git a/uppsrc/TCore/CalcNode.h b/uppsrc/TCore/CalcNode.h
index f7e53b23b..9e5796a5b 100644
--- a/uppsrc/TCore/CalcNode.h
+++ b/uppsrc/TCore/CalcNode.h
@@ -27,6 +27,7 @@ public:
 	double              CalcDouble(CalcContext& context) const;
 	String              CalcString(CalcContext& context) const;
 	int                 CalcInt(CalcContext& context) const;
+	int64               CalcInt64(CalcContext& context) const;
 	Date                CalcDate(CalcContext& context) const;
 	Time                CalcTime(CalcContext& context) const;
 	bool                CalcBool(CalcContext& context) const;
@@ -348,6 +349,7 @@ public:
 	double              EvaluateDouble(String expr);
 	String              EvaluateString(String expr);
 	int                 EvaluateInt(String expr);
+	int64               EvaluateInt64(String expr);
 	Date                EvaluateDate(String expr);
 	Time                EvaluateTime(String expr);
 	bool                EvaluateBool(String expr, bool null_value = false);