diff --git a/src/pkg/strconv/ftoa.go b/src/pkg/strconv/ftoa.go
index 656d81c..3659243 100644
--- a/src/pkg/strconv/ftoa.go
+++ b/src/pkg/strconv/ftoa.go
@@ -154,21 +154,27 @@
 	case 'f':
 		return fmtF(neg, d, prec)
 	case 'g', 'G':
-		// trailing zeros are removed.
-		if prec > d.nd {
-			prec = d.nd
+		// trailing fractional zeros in 'e' form will be trimmed.
+		eprec := prec
+		if eprec > d.nd && d.nd >= d.dp {
+			eprec = d.nd
 		}
 		// %e is used if the exponent from the conversion
 		// is less than -4 or greater than or equal to the precision.
 		// if precision was the shortest possible, use precision 6 for this decision.
-		eprec := prec
 		if shortest {
 			eprec = 6
 		}
 		exp := d.dp - 1
 		if exp < -4 || exp >= eprec {
+			if prec > d.nd {
+				prec = d.nd
+			}
 			return fmtE(neg, d, prec-1, fmt+'e'-'g')
 		}
+		if prec > d.dp {
+			prec = d.nd
+		}
 		return fmtF(neg, d, max(prec-d.dp, 0))
 	}