diff --git a/SRWS1.cpp b/SRWS1.cpp
index fa33a7a0..19003a27 100644
--- a/SRWS1.cpp
+++ b/SRWS1.cpp
@@ -113,7 +113,7 @@ void SRWS1::setLeds(uint16_t leds) {
         uint8_t buf[3];
         buf[0] = 0x40; // Report ID
         buf[1] = leds & 0xFF;
-        buf[2] = leds >> 8;
+        buf[2] = (leds >> 8) & 0x7F;
         pUsb->outTransfer(bAddress, epInfo[ hidInterfaces[0].epIndex[epInterruptOutIndex] ].epAddr, sizeof(buf), buf);
 }