diff --git a/src/simulation/elements/TRON.cpp b/src/simulation/elements/TRON.cpp
index e883a1777..6d54125e9 100644
--- a/src/simulation/elements/TRON.cpp
+++ b/src/simulation/elements/TRON.cpp
@@ -125,7 +125,7 @@ int Element_TRON::update(UPDATE_FUNC_ARGS)
 
 		//set own life and clear .tmp (it dies if it can't move anyway)
 		parts[i].life = parts[i].tmp2;
-		parts[i].tmp &= parts[i].tmp&0xF810;
+		parts[i].tmp &= parts[i].tmp&0xF818;
 	}
 	else // fade tail deco, or prevent tail from dieing
 	{