diff --git a/src/rezplugins/shell/powershell.py b/src/rezplugins/shell/powershell.py
index fa14a8179..df7f5b02e 100644
--- a/src/rezplugins/shell/powershell.py
+++ b/src/rezplugins/shell/powershell.py
@@ -198,7 +198,7 @@ def resetenv(self, key, value, friends=None):
         self._addline(self.setenv(key, value))
 
     def alias(self, key, value):
-        self._addline("Set-Alias -Name %s -Value \"%s\"" % key, value)
+        self._addline("Set-Alias -Name %s -Value \"%s\"" % (key, value))
 
     def comment(self, value):
         for line in value.split('\n'):