diff --git a/LuaLibs/WallExec.lua b/LuaLibs/WallExec.lua
index a75e33f..72c9bfe 100644
--- a/LuaLibs/WallExec.lua
+++ b/LuaLibs/WallExec.lua
@@ -593,7 +593,7 @@ function InsertScrapRemoval( nPhase)
    local nActiveMachiningId = EgtGetCurrMachining()
    while nCurrentOperationId do
       local bIsCurrentOperationOutline = ( EgtGetInfo( nCurrentOperationId or GDB_ID.NULL, 'ISOUTLINE', 'b' ) == true)
-      local bIsCurrentOperationWithPriority = ( EgtGetInfo( nCurrentOperationId or GDB_ID.NULL, 'PRIORITY', 'i' ) > 0)
+      local bIsCurrentOperationWithPriority = ( ( EgtGetInfo( nCurrentOperationId or GDB_ID.NULL, 'PRIORITY', 'i' ) or 0) > 0)
       local nNextOperationId = EgtGetNextOperation (nCurrentOperationId)
       local bIsNextOperationOutline = ( EgtGetInfo( nNextOperationId or GDB_ID.NULL, 'ISOUTLINE', 'b' ) == true)
       if bIsCurrentOperationOutline and bIsCurrentOperationWithPriority and nNextOperationId and not bIsNextOperationOutline then