diff --git a/indra/llxuixml/llinitparam.h b/indra/llxuixml/llinitparam.h
index 606676be2c001450cc44d1d0577e0c45fe51c128..71cd550693b09c652e453a452dd10461ff4744bf 100644
--- a/indra/llxuixml/llinitparam.h
+++ b/indra/llxuixml/llinitparam.h
@@ -2015,10 +2015,12 @@ namespace LLInitParam
 			}
 		};
 
-		class Deprecated : public Param
+		// can appear in data files, but will ignored during parsing
+		// cannot read or write in code
+		class Ignored : public Param
 		{
 		public:
-			explicit Deprecated(const char* name)
+			explicit Ignored(const char* name)
 			:	Param(DERIVED_BLOCK::getBlockDescriptor().mCurrentBlockPtr)
 			{
 				BlockDescriptor& block_descriptor = DERIVED_BLOCK::getBlockDescriptor();
@@ -2049,8 +2051,34 @@ namespace LLInitParam
 			}
 		};
 
-		// different semantics for documentation purposes, but functionally identical
-		typedef Deprecated Ignored;
+		// can appear in data files, or be written to in code, but data will be ignored
+		// cannot be read in code
+		class Deprecated : public Ignored
+		{
+		public:
+			explicit Deprecated(const char* name) : Ignored(name) {}
+
+			// dummy writer interfaces
+			template<typename T>
+			Deprecated& operator =(const T& val)
+			{
+				// do nothing
+				return *this;
+			}
+
+			template<typename T>
+			DERIVED_BLOCK& operator()(const T& val)
+			{
+				// do nothing
+				return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock());
+			}
+
+			template<typename T>
+			void set(const T& val, bool flag_as_provided = true)
+			{
+				// do nothing
+			}
+		};
 
 	public:
 		static BlockDescriptor& getBlockDescriptor()
diff --git a/indra/newview/llinventoryfilter.cpp b/indra/newview/llinventoryfilter.cpp
index 3f38d80a3967142838efd9db547bb7167b27a9ee..3e14faa55e885048a778f7e5734dad82e3592cf3 100644
--- a/indra/newview/llinventoryfilter.cpp
+++ b/indra/newview/llinventoryfilter.cpp
@@ -89,7 +89,7 @@ bool LLInventoryFilter::check(const LLFolderViewModelItem* item)
 	const BOOL passed_clipboard = (listener ? checkAgainstClipboard(listener->getUUID()) : TRUE);
 
 	// If it's a folder and we're showing all folders, return automatically.
-	const BOOL is_folder = listener->getInventoryType() == LLInventoryType::IT_CATEGORY;;
+	const BOOL is_folder = listener->getInventoryType() == LLInventoryType::IT_CATEGORY;
 	if (is_folder && (mFilterOps.mShowFolderState == LLInventoryFilter::SHOW_ALL_FOLDERS))
 	{
 		return passed_clipboard;