diff --git a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
index 903eea3057..9e8b2fa018 100644
--- a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
@@ -290,7 +290,7 @@ func init() {
 
 		// Pseudo-ops
 		{name: "LoweredPanicNilCheck"},
-		{name: "LoweredGetG"},
+		{name: "LoweredGetG", reg: gp01},
 	}
 
 	var AMD64blocks = []blockData{
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go
index 425c7e468c..6f412806c8 100644
--- a/src/cmd/compile/internal/ssa/opGen.go
+++ b/src/cmd/compile/internal/ssa/opGen.go
@@ -2123,7 +2123,11 @@ var opcodeTable = [...]opInfo{
 	},
 	{
 		name: "LoweredGetG",
-		reg:  regInfo{},
+		reg: regInfo{
+			outputs: []regMask{
+				65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
+			},
+		},
 	},
 
 	{