diff --git a/win32utils/Configure b/win32utils/Configure
index b544c3240b..b737f9211f 100644
--- a/win32utils/Configure
+++ b/win32utils/Configure
@@ -518,6 +518,7 @@ my @substvar = ("BIND9_VERSION",
                 "PKCS11_TOOLS",
                 "prefix",
                 "PYTHON",
+                "PYTHON_INSTALL_DIR",
                 "VCREDIST_PATH"),
 
 # defines