diff --git a/tools/get.py b/tools/get.py
index f5c292999..a1091c5f0 100755
--- a/tools/get.py
+++ b/tools/get.py
@@ -58,7 +58,7 @@ def unpack(filename, destination):
         raise NotImplementedError('Unsupported archive type')
 
     # a little trick to rename tool directories so they don't contain version number
-    rename_to = re.match(r'^([a-z][^\-]*\-*)+', dirname).group(0).strip('-')
+    rename_to = re.match(r'^([a-zA-Z_][^\-]*\-*)+', dirname).group(0).strip('-')
     if rename_to != dirname:
         print('Renaming {0} to {1}'.format(dirname, rename_to))
         if os.path.isdir(rename_to):