diff --git a/xpcom/analysis/outparams.js b/xpcom/analysis/outparams.js
index 61ab66a8cd25..196beea69ab9 100644
--- a/xpcom/analysis/outparams.js
+++ b/xpcom/analysis/outparams.js
@@ -685,9 +685,9 @@ function param_semantics(decl) {
   for each (let attr in rectify_attributes(DECL_ATTRIBUTES(decl))) {
     if (attr.name == 'user') {
       for each (let arg in attr.args) {
-        if (arg == 'outparam') {
+        if (arg == 'NS_outparam') {
           return ps.OUT;
-        } else if (arg == 'inoutparam') {
+        } else if (arg == 'NS_inoutparam') {
           return ps.INOUT;
         }
       }
diff --git a/xpcom/base/nscore.h b/xpcom/base/nscore.h
index 878fdf1163d9..cf7e1f4f5792 100644
--- a/xpcom/base/nscore.h
+++ b/xpcom/base/nscore.h
@@ -255,19 +255,6 @@
 # define NS_DEPRECATED
 #endif
 
-/**
- * Attributes defined to help Dehydra GCC analysis.	
- */
-#ifdef STATIC_CHECKING
-# define NS_SCRIPTABLE __attribute__((user("NS_script")))
-# define NS_OUTPARAM  __attribute__((user("NS_outparam")))
-# define NS_INOUTPARAM __attribute__((user("NS_inoutparam")))
-#else
-# define NS_SCRIPTABLE
-# define NS_OUTPARAM
-# define NS_INOUTPARAM
-#endif
-
 /**
  * Generic API modifiers which return the standard XPCOM nsresult type
  */
@@ -509,4 +496,17 @@ typedef PRUint32 nsrefcnt;
 #define NS_FINAL_CLASS
 #endif
 
+/**
+ * Attributes defined to help Dehydra GCC analysis.	
+ */
+#ifdef NS_STATIC_CHECKING
+# define NS_SCRIPTABLE __attribute__((user("NS_script")))
+# define NS_OUTPARAM  __attribute__((user("NS_outparam")))
+# define NS_INOUTPARAM __attribute__((user("NS_inoutparam")))
+#else
+# define NS_SCRIPTABLE
+# define NS_OUTPARAM
+# define NS_INOUTPARAM
+#endif
+
 #endif /* nscore_h___ */
diff --git a/xpcom/glue/nsArrayEnumerator.h b/xpcom/glue/nsArrayEnumerator.h
index dba8a4575c78..d7b3699e7b0a 100644
--- a/xpcom/glue/nsArrayEnumerator.h
+++ b/xpcom/glue/nsArrayEnumerator.h
@@ -51,7 +51,7 @@ class nsCOMArray_base;
 // Create an enumerator for an existing nsIArray implementation
 // The enumerator holds an owning reference to the array.
 NS_COM_GLUE nsresult
-NS_NewArrayEnumerator(nsISimpleEnumerator* *result,
+NS_NewArrayEnumerator(nsISimpleEnumerator* *result NS_OUTPARAM,
                       nsIArray* array);
 
 // create an enumerator for an existing nsCOMArray<T> implementation
@@ -59,7 +59,7 @@ NS_NewArrayEnumerator(nsISimpleEnumerator* *result,
 // the array. This means that the nsCOMArray<T> can safely go away
 // without its objects going away.
 NS_COM_GLUE nsresult
-NS_NewArrayEnumerator(nsISimpleEnumerator* *aResult,
+NS_NewArrayEnumerator(nsISimpleEnumerator* *aResult NS_OUTPARAM,
                       const nsCOMArray_base& aArray);
 
 #endif