diff --git a/TargetSpecific.md b/TargetSpecific.md
index ef703bfa..3f606ae8 100644
--- a/TargetSpecific.md
+++ b/TargetSpecific.md
@@ -36,7 +36,7 @@ func sumGeneric(out *[16]byte, m []byte, key *[32]byte) {
 poly1305_amd64.go
 
 ```go
-// +build !gccgo,!purego
+// +build gc,!purego
 
 package poly1305
 
@@ -47,7 +47,7 @@ func sum(out *[16]byte, m []byte, key *[32]byte)
 poly1305_amd64.s
 
 ```
-// +build !gccgo,!purego
+// +build gc,!purego
 
 // func sum(out *[16]byte, m []byte, key *[32]byte)
 TEXT ·sum(SB), $0-128
@@ -57,7 +57,7 @@ TEXT ·sum(SB), $0-128
 poly1305_noasm.go
 
 ```go
-// +build !amd64 gccgo purego
+// +build !amd64 !gc purego
 
 package poly1305
 
@@ -90,4 +90,4 @@ func TestSumCompare(t *testing.T) {
 
 For more complete examples see the [x/crypto/poly1305](https://github.com/golang/crypto/tree/master/poly1305) and [x/crypto/salsa20/salsa](https://github.com/golang/crypto/tree/master/salsa20/salsa) packages.
 
-Note that packages in the standard library (as opposed to modules like golang.org/x/crypto) do not use the `gccgo` and `purego` build tags.
\ No newline at end of file
+Note that packages in the standard library (as opposed to modules like golang.org/x/crypto) do not use the `gc` and `purego` build tags.
\ No newline at end of file