diff --git a/boot/mynewt/src/main.c b/boot/mynewt/src/main.c
index 891e19d..aadda36 100755
--- a/boot/mynewt/src/main.c
+++ b/boot/mynewt/src/main.c
@@ -218,8 +218,8 @@
     assert(rc == 0);
 #endif
 
-#if defined(MCUBOOT_SERIAL) || defined(MCUBOOT_HAVE_LOGGING)
-    /* initialize uart without os */
+#if defined(MCUBOOT_SERIAL) || defined(MCUBOOT_HAVE_LOGGING) || MYNEWT_VAL(CRYPTO)
+    /* initialize uart/crypto without os */
     os_dev_initialize_all(OS_DEV_INIT_PRIMARY);
     os_dev_initialize_all(OS_DEV_INIT_SECONDARY);
     sysinit();