diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_IAR/NANO130.icf b/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_IAR/NANO130.icf
index ea871f3a96..647110ab0d 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_IAR/NANO130.icf
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_IAR/NANO130.icf
@@ -24,7 +24,7 @@ define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
 define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
 
 
-initialize by copy { readwrite };
+initialize by copy with packing = none { readwrite };
 do not initialize  { section .noinit };
 
 place at address mem:__ICFEDIT_intvec_start__ { block ROMVEC };