diff --git a/teensy4/startup.c b/teensy4/startup.c
index 8a17bf608..dc70590f9 100644
--- a/teensy4/startup.c
+++ b/teensy4/startup.c
@@ -257,9 +257,6 @@ FLASHMEM void configure_cache(void)
 	SCB_MPU_RBAR = 0x60000000 | REGION(i++); // QSPI Flash
 	SCB_MPU_RASR = MEM_CACHE_WBWA | READONLY | SIZE_16M;
 
-	SCB_MPU_RBAR = 0x70000000 | REGION(i++); // FlexSPI2
-	SCB_MPU_RASR = MEM_CACHE_WBWA | READONLY | NOEXEC | SIZE_256M;
-
 	SCB_MPU_RBAR = 0x70000000 | REGION(i++); // FlexSPI2
 	SCB_MPU_RASR = MEM_CACHE_WBWA | READWRITE | NOEXEC | SIZE_16M;