diff --git a/firmware/apps/trace/main.c b/firmware/apps/trace/main.c
index 2e6dc31d..e7ce7b72 100644
--- a/firmware/apps/trace/main.c
+++ b/firmware/apps/trace/main.c
@@ -37,6 +37,7 @@ static const conf_func config_func_ptrs[] = {
 		.exit = Sniffer_exit,
 		.run = Sniffer_run,
 		.usart0_irq = Sniffer_usart0_irq,
+		.usart1_irq = Sniffer_usart1_irq,
 	},
 #endif
 #ifdef HAVE_CCID
diff --git a/firmware/libcommon/include/simtrace.h b/firmware/libcommon/include/simtrace.h
index e39d1dc1..278d5d22 100644
--- a/firmware/libcommon/include/simtrace.h
+++ b/firmware/libcommon/include/simtrace.h
@@ -109,6 +109,7 @@ extern void MITM_run( void );
 
 /*  IRQ functions   */
 extern void Sniffer_usart0_irq(void);
+extern void Sniffer_usart1_irq(void);
 extern void mode_cardemu_usart0_irq(void);
 extern void mode_cardemu_usart1_irq(void);