diff --git a/tools/build.py b/tools/build.py
index 94f4debad..4de8e9c7d 100644
--- a/tools/build.py
+++ b/tools/build.py
@@ -280,8 +280,9 @@ def replace(file, searchExp, replaceExp):
         print('Featching files {}...'.format(color_string(obj,'\033[96m',auto_color)))
         shutil.copy2(obj, temp)
 
-    if not os.path.isdir('release'):
-        relase_folder = os.mkdir('release')
+    relase_folder = 'release'                
+    if not os.path.isdir(relase_folder):     
+        os.mkdir(relase_folder)
 
     if public_version:
         public_build = ' public'