diff --git a/judo-tatami-jsl-jsl2psm/src/main/epsilon/operations/jsl/data/transferFieldDeclaration.eol b/judo-tatami-jsl-jsl2psm/src/main/epsilon/operations/jsl/data/transferFieldDeclaration.eol
index edf775d7..f0e71d5c 100644
--- a/judo-tatami-jsl-jsl2psm/src/main/epsilon/operations/jsl/data/transferFieldDeclaration.eol
+++ b/judo-tatami-jsl-jsl2psm/src/main/epsilon/operations/jsl/data/transferFieldDeclaration.eol
@@ -36,8 +36,8 @@ operation JSL!TransferFieldDeclaration getFqName(): String {
 
 @cached
 operation JSL!TransferFieldDeclaration isGetUploadTokenSupported(): Boolean {
-	
-	if (self.referenceType.`primitive` != "binary") {
+
+	if (self.referenceType.primitive.isUndefined() or self.referenceType.primitive <> "binary") {
 		return false;
 	}