diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
index 577abba3fac64a092e0bac9e47b9a51cee7ed415..83bb96079c43c513a832c6dd41a8de32a9cdffe6 100644
--- a/arch/score/kernel/entry.S
+++ b/arch/score/kernel/entry.S
@@ -408,7 +408,7 @@ ENTRY(handle_sys)
 	sw	r9, [r0, PT_EPC]
 
 	cmpi.c	r27, __NR_syscalls 	# check syscall number
-	bgtu	illegal_syscall
+	bgeu	illegal_syscall
 
 	slli	r8, r27, 2		# get syscall routine
 	la	r11, sys_call_table