diff --git a/embassy-stm32/src/flash/l.rs b/embassy-stm32/src/flash/l.rs
index bc6f8c873..3b62fa2ee 100644
--- a/embassy-stm32/src/flash/l.rs
+++ b/embassy-stm32/src/flash/l.rs
@@ -248,3 +248,13 @@ pub(crate) fn check_bank_setup() {
         panic!("Embassy is configured as dual-bank, but the hardware is running in single-bank mode. Change the hardware by changing the dbank value in the user option bytes or configure embassy to use single-bank config");
     }
 }
+
+#[cfg(all(bank_setup_configurable, flash_l4))]
+pub(crate) fn check_bank_setup() {
+    if cfg!(feature = "single-bank") && pac::FLASH.optr().read().dualbank() {
+        panic!("Embassy is configured as single-bank, but the hardware is running in dual-bank mode. Change the hardware by changing the dualbank value in the user option bytes or configure embassy to use dual-bank config");
+    }
+    if cfg!(feature = "dual-bank") && !pac::FLASH.optr().read().dualbank() {
+        panic!("Embassy is configured as dual-bank, but the hardware is running in single-bank mode. Change the hardware by changing the dualbank value in the user option bytes or configure embassy to use single-bank config");
+    }
+}