diff --git a/couchjs/c_src/SConscript b/couchjs/c_src/SConscript
index a5f8b66b..da3752bc 100644
--- a/couchjs/c_src/SConscript
+++ b/couchjs/c_src/SConscript
@@ -86,6 +86,13 @@ if not env.GetOption('clean'):
             conf.Define(vsn)
             break
 
+    ## Find the proper type for JS script objects
+
+    if conf.CheckType("JSScript*", '#include "%s"' % jsapi):
+        conf.Define("JSSCRIPT_TYPE", "JSScript*")
+    else:
+        conf.Define("JSSCRIPT_TYPE", "JSObject*")
+
     ## Define properties for -h / -V
 
     (_, vsn) = runcmd("git describe --match 1.*")