diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 4f424ae3b36de8225e5bee3977bde03a82548bb4..ad82468bd94d0dea2dda6472a734ff1745dfe9df 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -1464,5 +1464,5 @@ void __init cmdline_init(const char *r0)
 {
 	early_shadow_stamp();
 	if (r0)
-		strncpy(command_line, r0, COMMAND_LINE_SIZE);
+		strlcpy(command_line, r0, COMMAND_LINE_SIZE);
 }