diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c
index e52a6547..82397c4b 100644
--- a/lib/sbi/sbi_ecall.c
+++ b/lib/sbi/sbi_ecall.c
@@ -79,7 +79,7 @@ int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
 	unsigned long extension_id = regs->a7;
 	unsigned long func_id = regs->a6;
 	struct sbi_trap_info trap = {0};
-	unsigned long out_val;
+	unsigned long out_val = 0;
 	bool is_0_1_spec = 0;
 	unsigned long args[6];