diff --git a/cmd/zedmon/record.go b/cmd/zedmon/record.go
index 9aec977..1c71cb6 100644
--- a/cmd/zedmon/record.go
+++ b/cmd/zedmon/record.go
@@ -61,7 +61,7 @@
 	}
 	defer zedmon.Close()
 
-	f, err := os.OpenFile("zedmon.csv", os.O_CREATE|os.O_RDWR, 0666)
+	f, err := os.OpenFile("zedmon.csv", os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666)
 	if err != nil {
 		fmt.Printf("Can't open zedmon.csv: %v", err)
 		return subcommands.ExitFailure