diff --git a/common/types.go b/common/types.go
index d28075c273..24e8338af7 100644
--- a/common/types.go
+++ b/common/types.go
@@ -131,7 +131,7 @@ func (h Hash) String() string {
 }
 
 // Format implements fmt.Formatter.
-// Hash supports the %v, %s, %v, %x, %X and %d format verbs.
+// Hash supports the %v, %s, %q, %x, %X and %d format verbs.
 func (h Hash) Format(s fmt.State, c rune) {
 	hexb := make([]byte, 2+len(h)*2)
 	copy(hexb, "0x")