diff --git a/src/led_stub.cpp b/src/led_stub.cpp
index 1acbfb2..357a9ab 100644
--- a/src/led_stub.cpp
+++ b/src/led_stub.cpp
@@ -286,6 +286,8 @@ void DefaultLedStub::flash_activity() {
 void DefaultLedStub::flash_sysex() {
     if (!initialized || !mux_ptr) return;
     
+    uint32_t now = millis();
+    
     // Save all LED states
     for (int i = 0; i < NUM_LEDS; i++) {
         if (led_states[i].active) {