diff --git a/FATtools/utils.py b/FATtools/utils.py
index 72d5af1..ffe3261 100644
--- a/FATtools/utils.py
+++ b/FATtools/utils.py
@@ -193,7 +193,10 @@ def calc_rel_path(base, child):
     # returns base if they don't share anything
     if not i: return base
     n = len(child_parts) - 1 - i # counts path separators
-    relpath = ''
+    if n:
+        relpath = ''
+    else:
+        relpath = '.\\'
     while n:
         relpath += '..\\'
         n -= 1
diff --git a/FATtools/version.py b/FATtools/version.py
index 1f410b8..aa8d766 100644
--- a/FATtools/version.py
+++ b/FATtools/version.py
@@ -1 +1 @@
-__version__ = '1.0.36'
\ No newline at end of file
+__version__ = '1.0.37'
\ No newline at end of file