diff --git a/src/tink/validation/Extractor.hx b/src/tink/validation/Extractor.hx
index 7034ec4..1ac2180 100644
--- a/src/tink/validation/Extractor.hx
+++ b/src/tink/validation/Extractor.hx
@@ -11,7 +11,7 @@ class ExtractorBase {
 	public function new() {}
 	
 	function extractInt64(value:Dynamic) {
-		if(Int64.is(value)) return value;
+		if(Int64.isInt64(value)) return value;
 		
 		if(Std.is(value, Int)) {
 			var v:Int = value;
@@ -29,4 +29,4 @@ class ExtractorBase {
 		
 		throw tink.validation.Error.UnexpectedType(path, 'Int64', value);
 	}
-}
\ No newline at end of file
+}