diff --git a/src/arch/aarch64/hypervisor/handler.c b/src/arch/aarch64/hypervisor/handler.c
index 440cd66..8c97203 100644
--- a/src/arch/aarch64/hypervisor/handler.c
+++ b/src/arch/aarch64/hypervisor/handler.c
@@ -582,7 +582,7 @@
 
 	case 0x17: /* EC = 010111, SMC instruction. */ {
 		uintreg_t smc_pc = vcpu->regs.pc;
-		smc_res_t ret;
+		smc_res_t ret = {0};
 		struct vcpu *next = NULL;
 
 		if (!smc_handler(vcpu, &ret, &next)) {