diff --git a/processor/processor.go b/processor/processor.go
index f90879b..eefaa63 100644
--- a/processor/processor.go
+++ b/processor/processor.go
@@ -508,7 +508,7 @@ func EvalRegex(L *lua.LState) int {
 
 	matchesTable := L.NewTable()
 	for i, match := range matches {
-		matchesTable.RawSetString(fmt.Sprintf("%d", i), lua.LString(match))
+		matchesTable.RawSetInt(i, lua.LString(match))
 		evalRegexLogger.Debug("Set table[%d] = %q", i, match)
 	}