diff --git a/addMutex.go b/addMutex.go
index 8a4b0f3..082d1bc 100644
--- a/addMutex.go
+++ b/addMutex.go
@@ -22,7 +22,7 @@ func addMutex(names map[string]string) error {
 		return err
 	}
 
-	w, _ := os.OpenFile(names["protobase"]+".pb.go", os.O_WRONLY|os.O_CREATE, 0600)
+	w, _ := os.OpenFile(names["protobase"]+".pb.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
 
 	var found bool
 
diff --git a/marshal.go b/marshal.go
index 91ea414..7585a6d 100644
--- a/marshal.go
+++ b/marshal.go
@@ -17,7 +17,7 @@ func marshal(names map[string]string) {
 		os.Exit(0)
 	}
 
-	w, _ := os.OpenFile(names["protobase"]+".marshal.pb.go", os.O_WRONLY|os.O_CREATE, 0600)
+	w, _ := os.OpenFile(names["protobase"]+".marshal.pb.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
 
 	fmt.Fprintln(w, "package "+names["package"])
 	headerComment(w)
diff --git a/sort.go b/sort.go
index a816f9f..70e912d 100644
--- a/sort.go
+++ b/sort.go
@@ -8,7 +8,7 @@ import (
 )
 
 func makeSortfile() {
-	f, _ := os.OpenFile(sortmap["protobase"]+".sort.pb.go", os.O_WRONLY|os.O_CREATE, 0600)
+	f, _ := os.OpenFile(sortmap["protobase"]+".sort.pb.go", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
 
 	header(f, sortmap)