diff --git a/sig_test.go b/sig_test.go
index da37bc9..4c6eb8e 100644
--- a/sig_test.go
+++ b/sig_test.go
@@ -49,10 +49,10 @@ func TestSig(t *testing.T) {
 
 var getSigTest = []interface{}{
 	[]struct {
-		b byte
-		i int32
-		t uint64
-		s string
+		B byte
+		I int32
+		T uint64
+		S string
 	}{},
 	map[string]Variant{},
 }