diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 31175b34856a..9256cfaa8b6f 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -981,7 +981,7 @@ static char *__fetch_rtas_last_error(char *altbuf)
 				buf = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC);
 		}
 		if (buf)
-			memcpy(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX);
+			memmove(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX);
 	}
 
 	return buf;