diff --git a/src/fmt/print.go b/src/fmt/print.go
index b7d24a8c473..460712cfe98 100644
--- a/src/fmt/print.go
+++ b/src/fmt/print.go
@@ -578,11 +578,6 @@ func (p *pp) fmtPointer(value reflect.Value, verb rune) {
 	}
 }
 
-var (
-	intBits     = reflect.TypeOf(0).Bits()
-	uintptrBits = reflect.TypeOf(uintptr(0)).Bits()
-)
-
 func (p *pp) catchPanic(arg interface{}, verb rune) {
 	if err := recover(); err != nil {
 		// If it's a nil pointer, just say "<nil>". The likeliest causes are a
diff --git a/src/fmt/scan.go b/src/fmt/scan.go
index bf7c9acb8ec..08b0bf96a6e 100644
--- a/src/fmt/scan.go
+++ b/src/fmt/scan.go
@@ -915,9 +915,14 @@ func (s *ss) hexString() string {
 	return string(s.buf)
 }
 
-const floatVerbs = "beEfFgGv"
+const (
+	floatVerbs = "beEfFgGv"
 
-const hugeWid = 1 << 30
+	hugeWid = 1 << 30
+
+	intBits     = 32 << (^uint(0) >> 63)
+	uintptrBits = 32 << (^uintptr(0) >> 63)
+)
 
 // scanOne scans a single value, deriving the scanner from the type of the argument.
 func (s *ss) scanOne(verb rune, arg interface{}) {