diff --git a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
index 8161ed7b13..cbd5ac7dcc 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
@@ -140,7 +140,7 @@ timestamp_t lp_ticker_read()
         while (minor_clks == 0 || minor_clks == TMR2_CLK_PER_TMR2_INT);
 
         // Add power-down compensation
-        return ((uint64_t) major_minor_clks * US_PER_SEC / TMR3_CLK_PER_SEC / US_PER_TICK);
+        return ((uint64_t) major_minor_clks * US_PER_SEC / TMR2_CLK_PER_SEC / US_PER_TICK);
     }
     while (0);
 }