diff --git a/internal/gocore/dwarf.go b/internal/gocore/dwarf.go
index 7267270..d185d34 100644
--- a/internal/gocore/dwarf.go
+++ b/internal/gocore/dwarf.go
@@ -204,7 +204,10 @@
 	if e.Tag != dwarf.TagCompileUnit {
 		return false
 	}
-	prod := e.AttrField(dwarf.AttrProducer).Val.(string)
+	prod, ok := e.Val(dwarf.AttrProducer).(string)
+	if !ok {
+		return true
+	}
 	return !strings.Contains(prod, "Go cmd/compile")
 }