diff --git a/src/reflect/asm_riscv64.s b/src/reflect/asm_riscv64.s
index f5886e537a..e6fab39874 100644
--- a/src/reflect/asm_riscv64.s
+++ b/src/reflect/asm_riscv64.s
@@ -16,7 +16,7 @@ TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$32
 	MOV	T0, 16(SP)
 	ADD	$32, SP, T1
 	MOV	T1, 24(SP)
-	MOVB	R0, 32(SP)
+	MOVB	ZERO, 32(SP)
 	CALL	·callReflect(SB)
 	RET
 
@@ -31,6 +31,6 @@ TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$32
 	MOV	T0, 16(SP)
 	ADD	$32, SP, T1
 	MOV	T1, 24(SP)
-	MOVB	R0, 32(SP)
+	MOVB	ZERO, 32(SP)
 	CALL	·callMethod(SB)
 	RET