diff --git a/sszgen/testcases/issue_159.go b/sszgen/testcases/issue_159.go
new file mode 100644
index 0000000..6cd3ea0
--- /dev/null
+++ b/sszgen/testcases/issue_159.go
@@ -0,0 +1,8 @@
+package testcases
+
+//go:generate go run ../main.go --path issue_159.go -objs Issue159
+
+// Issue159 is a struct with a Data field
+type Issue159[B [48]byte] struct {
+	Data B `ssz-size:"48"`
+}