Index: doc/API_web.md
==================================================================
--- doc/API_web.md
+++ doc/API_web.md
@@ -38,11 +38,11 @@
 
 ### Detecting if the Grammalecte API is here
 
 Every call to the Grammalecte API will be done via an object called `oGrammalecteAPI`.
 
-    if (typeof(oGrammalecteAPI) === "object") {
+    if (typeof(oGrammalecteAPI) === "object"  &&  oGrammalecteAPI !== null) {
         ...
     }
 
 
 ### Version of the Grammalecte API