diff --git a/src/strconv/atof.go b/src/strconv/atof.go
    index 28ad094..49cec69 100644
    --- a/src/strconv/atof.go
    +++ b/src/strconv/atof.go
    @@ -410,12 +410,12 @@ out:
     }
     
     // Exact powers of 10.
    -var float64pow10 = []float64{
    +var float64pow10 = [...]float64{
      1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
      1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
      1e20, 1e21, 1e22,
     }
    -var float32pow10 = []float32{1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10}
    +var float32pow10 = [...]float32{1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10}
     
     // If possible to convert decimal representation to 64-bit float f exactly,
     // entirely in floating-point math, do so, avoiding the expense of decimalToFloatBits.