diff --git a/src/crypto/des/block.go b/src/crypto/des/block.go
index 192913094e..e0299760d9 100644
--- a/src/crypto/des/block.go
+++ b/src/crypto/des/block.go
@@ -182,7 +182,7 @@ func permuteInitialBlock(block uint64) uint64 {
 	return block
 }
 
-// permuteInitialBlock is equivalent to the permutation defined
+// permuteFinalBlock is equivalent to the permutation defined
 // by finalPermutation.
 func permuteFinalBlock(block uint64) uint64 {
 	// Perform the same bit exchanges as permuteInitialBlock