diff --git a/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC176X/cmsis_nvic.c b/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC176X/cmsis_nvic.c
index 9e08052795..f47d5de754 100644
--- a/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC176X/cmsis_nvic.c
+++ b/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC176X/cmsis_nvic.c
@@ -13,7 +13,7 @@ void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
     uint32_t i;
 
     // Copy and switch to dynamic vectors if the first time called
-    if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
+    if (SCB->VTOR < NVIC_RAM_VECTOR_ADDRESS) {
         uint32_t *old_vectors = vectors;
         vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
         for (i=0; i<NVIC_NUM_VECTORS; i++) {