diff --git a/js/moz.configure b/js/moz.configure
index 7687731f99..f632edafec 100644
--- a/js/moz.configure
+++ b/js/moz.configure
@@ -44,8 +44,11 @@ js_option('--disable-shared-js', default=building_js,
 js_option('--disable-export-js', default=building_js,
           help='Do not mark JS symbols as DLL exported/visible')
 
-@depends('--disable-shared-js', '--disable-export-js')
-def shared_js(shared_js, export_js):
+@depends('--disable-shared-js', '--disable-export-js', target)
+def shared_js(shared_js, export_js, target):
+    # We want shared JS always be enabled on Windows regardless of the enable bool.
+    if target.os == 'WINNT':
+        return True
     if shared_js:
         if not export_js:
             die('Must export JS symbols when building a shared library.')
@@ -61,16 +64,18 @@ def exportable_js_api(shared_js, export_js):
 
 set_define('STATIC_EXPORTABLE_JS_API', exportable_js_api)
 
-@depends('--disable-shared-js', '--disable-export-js')
-def static_js_api(shared_js, export_js):
-    if not shared_js and not export_js:
+@depends('--disable-shared-js', '--disable-export-js', target)
+def static_js_api(shared_js, export_js, target):
+    # Do not build JS as a static library on Windows, regardless of enable bool.
+    if (target.os != 'WINNT') and not shared_js and not export_js:
         return True
 
 set_define('STATIC_JS_API', static_js_api)
 
-@depends('--disable-shared-js')
-def static_js(value):
-    if not value:
+@depends('--disable-shared-js', target)
+def static_js(value, target):
+    # Do not build JS as a static library on Windows, regardless of enable bool.
+    if (target.os != 'WINNT') and not value:
         return True
 
 set_define('MOZ_STATIC_JS', static_js)