diff --git a/embed/extmod/modtrezorconfig/norcow.c b/embed/extmod/modtrezorconfig/norcow.c
index 91878a567..8f4b49c75 100644
--- a/embed/extmod/modtrezorconfig/norcow.c
+++ b/embed/extmod/modtrezorconfig/norcow.c
@@ -214,7 +214,7 @@ static void compact()
 
     norcow_erase(norcow_active_sector, secfalse);
     norcow_active_sector = norcow_next_sector;
-    norcow_active_offset = offsetw;
+    norcow_active_offset = find_free_offset(norcow_active_sector);
 }
 
 /*
diff --git a/embed/unix/flash.c b/embed/unix/flash.c
index c800b3569..c8bf0c0eb 100644
--- a/embed/unix/flash.c
+++ b/embed/unix/flash.c
@@ -52,15 +52,12 @@ static const uint32_t sector_table[SECTOR_COUNT + 1] = {
     [24] = 0x08200000, // last element - not a valid sector
 };
 
-static int flash_fd;
 static uint8_t *flash_buffer;
 
 static void flash_exit(void)
 {
     int r = munmap(flash_buffer, FLASH_SIZE);
     ensure(sectrue * (r == 0), "munmap failed");
-    r = close(flash_fd);
-    ensure(sectrue * (r == 0), "close failed");
 }
 
 secbool flash_init(void)
@@ -90,7 +87,6 @@ secbool flash_init(void)
     void *map = mmap(0, FLASH_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
     ensure(sectrue * (map != MAP_FAILED), "mmap failed");
 
-    flash_fd = fd;
     flash_buffer = (uint8_t *)map;
 
     atexit(flash_exit);
diff --git a/tests/test_trezor.config.py b/tests/test_trezor.config.py
index b47523d4d..b97d4bce8 100644
--- a/tests/test_trezor.config.py
+++ b/tests/test_trezor.config.py
@@ -84,6 +84,17 @@ class TestConfig(unittest.TestCase):
             value2 = config.get(appid, key)
             self.assertEqual(value, value2)
 
+    def test_compact(self):
+        config.init()
+        config.wipe()
+        self.assertEqual(config.unlock(''), True)
+        appid, key = 1, 1
+        for _ in range(259):
+            value = random.bytes(259)
+            config.set(appid, key, value)
+        value2 = config.get(appid, key)
+        self.assertEqual(value, value2)
+
     def test_get_default(self):
         config.init()
         config.wipe()