diff --git a/fdroidserver/common.py b/fdroidserver/common.py
index ed567af8..df7c4905 100644
--- a/fdroidserver/common.py
+++ b/fdroidserver/common.py
@@ -123,7 +123,7 @@ def write_password_file(pwtype, password=None):
     command line argments
     '''
     filename = '.fdroid.' + pwtype + '.txt'
-    fd = os.open(filename, os.O_CREAT | os.O_WRONLY, 0600)
+    fd = os.open(filename, os.O_CREAT | os.O_TRUNC | os.O_WRONLY, 0600)
     if password == None:
         os.write(fd, config[pwtype])
     else: