diff --git a/hw/application_fpga/fw/tk1/main.c b/hw/application_fpga/fw/tk1/main.c
index 4232936..a098619 100644
--- a/hw/application_fpga/fw/tk1/main.c
+++ b/hw/application_fpga/fw/tk1/main.c
@@ -375,10 +375,10 @@ static void run_flash(const struct context *ctx, struct partition_table *part_ta
 	// CDI = hash(uds, hash(app), uss)
 	compute_cdi(ctx->digest, ctx->use_uss, ctx->uss);
 
-	if (part_table->pre_app_data.status == 0x02) {
+	if (part_table->pre_app_data.status == PRE_LOADED_STATUS_PRESENT) {
 		debug_puts("Create auth\n");
 		auth_app_create(&part_table->pre_app_data.auth);
-		part_table->pre_app_data.status = 0x01;
+		part_table->pre_app_data.status = PRE_LOADED_STATUS_AUTH;
 		part_table_write(part_table);
 	}
 
@@ -508,7 +508,7 @@ int main(void)
 	assert(digest_err == 0);
 	print_digest(ctx.digest);
 
-	part_table.pre_app_data.status = 0x02;
+	part_table.pre_app_data.status = PRE_LOADED_STATUS_PRESENT;
 
 	state = FW_STATE_RUN_FLASH;
 
diff --git a/hw/application_fpga/fw/tk1/partition_table.h b/hw/application_fpga/fw/tk1/partition_table.h
index 7a954bb..361bbe3 100644
--- a/hw/application_fpga/fw/tk1/partition_table.h
+++ b/hw/application_fpga/fw/tk1/partition_table.h
@@ -37,6 +37,11 @@
 #define ADDR_PRE_LOADED_APP (ADDR_PARTITION_TABLE + SIZE_PARTITION_TABLE)
 #define SIZE_PRE_LOADED_APP 0x20000UL // 128KiB
 
+// Pre-loaded app present and authenticated
+#define PRE_LOADED_STATUS_AUTH 0x01
+// Pre-loaded app present but not yet authenticated
+#define PRE_LOADED_STATUS_PRESENT 0x02
+
 #define ADDR_STORAGE_AREA (ADDR_PRE_LOADED_APP + SIZE_PRE_LOADED_APP)
 #define SIZE_STORAGE_AREA 0x20000UL // 128KiB
 #define N_STORAGE_AREA 4
diff --git a/hw/application_fpga/fw/tk1/preload_app.c b/hw/application_fpga/fw/tk1/preload_app.c
index f47d021..7f929bc 100644
--- a/hw/application_fpga/fw/tk1/preload_app.c
+++ b/hw/application_fpga/fw/tk1/preload_app.c
@@ -94,7 +94,7 @@ int preload_store_finalize(struct partition_table *part_table, bool use_uss,
 
 	part_table->pre_app_data.size = app_size;
 	part_table->pre_app_data.status =
-	    0x02; /* Stored but not yet authenticated */
+	    PRE_LOADED_STATUS_PRESENT; /* Stored but not yet authenticated */
 	debug_puts("preload_*_final: size: ");
 	debug_putinthex(app_size);
 	debug_lf();