diff --git a/copyparty/authsrv.py b/copyparty/authsrv.py
index 69bfc3f9..0f5cc6c5 100644
--- a/copyparty/authsrv.py
+++ b/copyparty/authsrv.py
@@ -10,7 +10,7 @@ import hashlib
 import threading
 
 from .__init__ import WINDOWS
-from .util import IMPLICATIONS, undot, Pebkac, fsdec, fsenc, statdir, nuprint
+from .util import IMPLICATIONS, uncyg, undot, Pebkac, fsdec, fsenc, statdir, nuprint
 
 
 class VFS(object):
@@ -439,8 +439,8 @@ class AuthSrv(object):
                     raise Exception("invalid -v argument: [{}]".format(v_str))
 
                 src, dst, perms = m.groups()
-                if WINDOWS and src.startswith("/"):
-                    src = "{}:\\{}".format(src[1], src[3:])
+                if WINDOWS:
+                    src = uncyg(src)
 
                 # print("\n".join([src, dst, perms]))
                 src = fsdec(os.path.abspath(fsenc(src)))
@@ -524,9 +524,7 @@ class AuthSrv(object):
             if vflag == "-":
                 pass
             elif vflag:
-                if WINDOWS and vflag.startswith("/"):
-                    vflag = "{}:\\{}".format(vflag[1], vflag[3:])
-                vol.histpath = vflag
+                vol.histpath = uncyg(vflag) if WINDOWS else vflag
             elif self.args.hist:
                 for nch in range(len(hid)):
                     hpath = os.path.join(self.args.hist, hid[: nch + 1])
diff --git a/copyparty/mtag.py b/copyparty/mtag.py
index daf3a233..f76a17eb 100644
--- a/copyparty/mtag.py
+++ b/copyparty/mtag.py
@@ -8,7 +8,7 @@ import shutil
 import subprocess as sp
 
 from .__init__ import PY2, WINDOWS
-from .util import fsenc, fsdec, REKOBO_LKEY
+from .util import fsenc, fsdec, uncyg, REKOBO_LKEY
 
 if not PY2:
     unicode = str
@@ -44,6 +44,9 @@ class MParser(object):
         while True:
             try:
                 bp = os.path.expanduser(args)
+                if WINDOWS:
+                    bp = uncyg(bp)
+
                 if os.path.exists(bp):
                     self.bin = bp
                     return
diff --git a/copyparty/util.py b/copyparty/util.py
index d7efb9dc..c4a1ae68 100644
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -648,6 +648,16 @@ def s2hms(s, optional_h=False):
     return "{}:{:02}:{:02}".format(h, m, s)
 
 
+def uncyg(path):
+    if not path.startswith("/"):
+        return path
+
+    if len(path) < 3 and path[2] != "/":
+        return path
+
+    return "{}:\\{}".format(path[1], path[3:])
+
+
 def undot(path):
     ret = []
     for node in path.split("/"):