diff --git a/extensions/xt_RAWNAT.c b/extensions/xt_RAWNAT.c
index f256e4c..063dcbe 100644
--- a/extensions/xt_RAWNAT.c
+++ b/extensions/xt_RAWNAT.c
@@ -48,7 +48,7 @@ rawnat_ipv6_mask(__be32 *addr, const __be32 *repl, unsigned int mask)
 		break;
 	case 33 ... 63:
 		addr[0] = repl[0];
-		addr[1] = remask(addr[1], repl[1], mask - 64);
+		addr[1] = remask(addr[1], repl[1], mask - 32);
 		break;
 	case 64:
 		addr[0] = repl[0];
@@ -57,7 +57,7 @@ rawnat_ipv6_mask(__be32 *addr, const __be32 *repl, unsigned int mask)
 	case 65 ... 95:
 		addr[0] = repl[0];
 		addr[1] = repl[1];
-		addr[2] = remask(addr[2], repl[2], mask - 96);
+		addr[2] = remask(addr[2], repl[2], mask - 64);
 	case 96:
 		addr[0] = repl[0];
 		addr[1] = repl[1];
@@ -67,7 +67,7 @@ rawnat_ipv6_mask(__be32 *addr, const __be32 *repl, unsigned int mask)
 		addr[0] = repl[0];
 		addr[1] = repl[1];
 		addr[2] = repl[2];
-		addr[3] = remask(addr[3], repl[3], mask - 128);
+		addr[3] = remask(addr[3], repl[3], mask - 96);
 		break;
 	case 128:
 		addr[0] = repl[0];