diff --git a/ports/stm32/mboot/fsload.c b/ports/stm32/mboot/fsload.c
index 231b07afa5..f3ea57c89f 100644
--- a/ports/stm32/mboot/fsload.c
+++ b/ports/stm32/mboot/fsload.c
@@ -198,7 +198,7 @@ static int fsload_program_file(bool write_to_flash) {
 static int fsload_validate_and_program_file(void *stream, const stream_methods_t *meth, const char *fname) {
     // First pass verifies the file, second pass programs it
     for (unsigned int pass = 0; pass <= 1; ++pass) {
-        led_state_all(pass == 0 ? 2 : 4);
+        mboot_state_change(MBOOT_STATE_FSLOAD_PASS_START, pass);
         int res = meth->open(stream, fname);
         if (res == 0) {
             res = input_stream_init(stream, meth->read);
diff --git a/ports/stm32/mboot/mboot.h b/ports/stm32/mboot/mboot.h
index db90e07a0e..d8531f19ba 100644
--- a/ports/stm32/mboot/mboot.h
+++ b/ports/stm32/mboot/mboot.h
@@ -64,6 +64,7 @@ typedef enum {
     MBOOT_STATE_DFU_END,            // arg: unused
     MBOOT_STATE_FSLOAD_START,       // arg: unused
     MBOOT_STATE_FSLOAD_END,         // arg: result of fsload operation
+    MBOOT_STATE_FSLOAD_PASS_START,  // arg: pass number, 0 or 1 (verify and write respectively)
     MBOOT_STATE_FSLOAD_PROGRESS,    // arg: total bytes processed so far, high bit set when doing write pass
     MBOOT_STATE_ERASE_START,        // arg: address of erase
     MBOOT_STATE_ERASE_END,          // arg: result of erase
diff --git a/ports/stm32/mboot/ui.c b/ports/stm32/mboot/ui.c
index 840803829e..aa62d31a0a 100644
--- a/ports/stm32/mboot/ui.c
+++ b/ports/stm32/mboot/ui.c
@@ -228,6 +228,10 @@ void mboot_state_change(mboot_state_t state, uint32_t arg) {
             }
             break;
 
+        case MBOOT_STATE_FSLOAD_PASS_START:
+            led_state_all(arg == 0 ? 2 : 4);
+            break;
+
         case MBOOT_STATE_FSLOAD_PROGRESS:
             break;