diff --git a/src/pkg/strconv/atoi.go b/src/pkg/strconv/atoi.go
index cbf0380ec8..9ecec5a58b 100644
--- a/src/pkg/strconv/atoi.go
+++ b/src/pkg/strconv/atoi.go
@@ -31,7 +31,7 @@ func rangeError(fn, str string) *NumError {
 	return &NumError{fn, str, ErrRange}
 }
 
-const intSize = 32 << uint(^uint(0)>>63)
+const intSize = 32 << (^uint(0) >> 63)
 
 // IntSize is the size in bits of an int or uint value.
 const IntSize = intSize