diff --git a/src/hsm.h b/src/hsm.h
index fcc3f84..8c0e6b9 100644
--- a/src/hsm.h
+++ b/src/hsm.h
@@ -62,6 +62,7 @@ enum  {
 extern void led_set_blink(uint32_t mode);
 
 extern bool is_req_button_pending();
+extern uint32_t button_timeout;
 
 #define SW_BYTES_REMAINING_00()             set_res_sw (0x61, 0x00)
 #define SW_WARNING_STATE_UNCHANGED()        set_res_sw (0x62, 0x00)
diff --git a/src/main.c b/src/main.c
index 60ecf24..9a32cd2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -73,6 +73,8 @@ bool is_req_button_pending() {
     return req_button_pending;
 }
 
+uint32_t button_timeout = 15000;
+
 bool wait_button() {
     uint32_t start_button = board_millis();
     bool timeout = false;
@@ -81,7 +83,7 @@ bool wait_button() {
     while (board_button_read() == false) {
         execute_tasks();
         //sleep_ms(10);
-        if (start_button + 15000 < board_millis()) { /* timeout */
+        if (start_button + button_timeout < board_millis()) { /* timeout */
             timeout = true;
             break;
         }