diff --git a/src/strconv/ftoa.go b/src/strconv/ftoa.go
index f602d0ffe6..fcbf4df13b 100644
--- a/src/strconv/ftoa.go
+++ b/src/strconv/ftoa.go
@@ -373,7 +373,6 @@ func roundShortest(d *decimal, mant uint64, exp int, flt *floatInfo) {
 type decimalSlice struct {
 	d      []byte
 	nd, dp int
-	neg    bool
 }
 
 // %e: -d.ddddde±dd