diff --git a/src/cmd/7g/gsubr.go b/src/cmd/7g/gsubr.go
index 0828daf9dd..2d2bdb7ca4 100644
--- a/src/cmd/7g/gsubr.go
+++ b/src/cmd/7g/gsubr.go
@@ -45,6 +45,8 @@ var unmappedzero int64 = 4096
 var resvd = []int{
 	arm64.REGTMP,
 	arm64.REGG,
+	arm64.REGRT1,
+	arm64.REGRT2,
 	arm64.REG_R31, // REGZERO and REGSP
 	arm64.FREGZERO,
 	arm64.FREGHALF,