diff --git a/wled00/improv.cpp b/wled00/improv.cpp
index abfd463c6d..31547f86c8 100644
--- a/wled00/improv.cpp
+++ b/wled00/improv.cpp
@@ -123,6 +123,7 @@ void handleImprovPacket() {
     }
 
     checksum += next;
+    checksum &= 0xFF;
     packetByte++;
   }
 }