diff --git a/firmware/apps/trace/main.c b/firmware/apps/trace/main.c
index 6b6d70be..f7eb15d5 100644
--- a/firmware/apps/trace/main.c
+++ b/firmware/apps/trace/main.c
@@ -142,10 +142,15 @@ extern int main(void)
 	enum confNum last_simtrace_config = simtrace_config;
 	unsigned int i = 0;
 
-	/* Configure LED output (red = on, green = activity */
+	/* Configure LED output
+	 * red on = power
+	 * red blink = error
+	 * green on = running
+	 * green blink = activity
+	 */
 	led_init();
 	led_blink(LED_RED, BLINK_ALWAYS_ON);
-	led_blink(LED_GREEN, BLINK_ALWAYS_OFF);
+	led_blink(LED_GREEN, BLINK_ALWAYS_ON);
 
 	/* Enable watchdog for 2000 ms, with no window */
 	WDT_Enable(WDT, WDT_MR_WDRSTEN | WDT_MR_WDDBGHLT | WDT_MR_WDIDLEHLT |
diff --git a/firmware/libcommon/source/sniffer.c b/firmware/libcommon/source/sniffer.c
index 8262bec2..9202d8e9 100644
--- a/firmware/libcommon/source/sniffer.c
+++ b/firmware/libcommon/source/sniffer.c
@@ -302,7 +302,7 @@ static void usb_send_data(enum simtrace_msg_type_sniff type, const uint8_t* data
 	}
 
 	/* Show activity on LED */
-	led_blink(LED_GREEN, BLINK_2O_F);
+	led_blink(LED_GREEN, BLINK_2F_O);
 
 	/* Print message */
 	switch (type) {