diff --git a/src/pkg/debug/dwarf/open.go b/src/pkg/debug/dwarf/open.go
index 37a518b6d3..7579892529 100644
--- a/src/pkg/debug/dwarf/open.go
+++ b/src/pkg/debug/dwarf/open.go
@@ -24,7 +24,6 @@ type Data struct {
 
 	// parsed data
 	abbrevCache map[uint32]abbrevTable
-	addrsize    int
 	order       binary.ByteOrder
 	typeCache   map[Offset]Type
 	unit        []unit