diff --git a/indra/llcommon/llstring.h b/indra/llcommon/llstring.h
index a40db0f8cc786473daff03886aa1a19a78f8be27..2fdb8be84feeaf85b5154751710b5b44dc57ec30 100644
--- a/indra/llcommon/llstring.h
+++ b/indra/llcommon/llstring.h
@@ -443,7 +443,7 @@ public:
 struct LLDictionaryLess
 {
 public:
-	bool operator()(const std::string& a, const std::string& b)
+	bool operator()(const std::string& a, const std::string& b) const
 	{
 		return (LLStringUtil::precedesDict(a, b) ? true : false);
 	}
diff --git a/indra/newview/llsearchhistory.cpp b/indra/newview/llsearchhistory.cpp
index 0ea05a03d6775bf1aa6effa9eaf5c0f68c756dff..449e0080f0e52eea772ec4ea4a36cf4227b4368c 100644
--- a/indra/newview/llsearchhistory.cpp
+++ b/indra/newview/llsearchhistory.cpp
@@ -116,26 +116,26 @@ void LLSearchHistory::addEntry(const std::string& search_query)
 	mSearchHistory.push_front(item);
 }
 
-bool LLSearchHistory::LLSearchHistoryItem::operator < (const LLSearchHistory::LLSearchHistoryItem& right)
+bool LLSearchHistory::LLSearchHistoryItem::operator < (const LLSearchHistory::LLSearchHistoryItem& right) const
 {
 	S32 result = LLStringUtil::compareInsensitive(search_query, right.search_query);
 
 	return result < 0;
 }
 
-bool LLSearchHistory::LLSearchHistoryItem::operator > (const LLSearchHistory::LLSearchHistoryItem& right)
+bool LLSearchHistory::LLSearchHistoryItem::operator > (const LLSearchHistory::LLSearchHistoryItem& right) const
 {
 	S32 result = LLStringUtil::compareInsensitive(search_query, right.search_query);
 
 	return result > 0;
 }
 
-bool LLSearchHistory::LLSearchHistoryItem::operator==(const LLSearchHistory::LLSearchHistoryItem& right)
+bool LLSearchHistory::LLSearchHistoryItem::operator==(const LLSearchHistory::LLSearchHistoryItem& right) const
 {
 	return 0 == LLStringUtil::compareInsensitive(search_query, right.search_query);
 }
 
-bool LLSearchHistory::LLSearchHistoryItem::operator==(const std::string& right)
+bool LLSearchHistory::LLSearchHistoryItem::operator==(const std::string& right) const
 {
 	return 0 == LLStringUtil::compareInsensitive(search_query, right);
 }
diff --git a/indra/newview/llsearchhistory.h b/indra/newview/llsearchhistory.h
index 3309a8fcac0d2a0447e4dd88220fe932fc3b461a..7fe2aa273781829705124a905d676f7c96b52630 100644
--- a/indra/newview/llsearchhistory.h
+++ b/indra/newview/llsearchhistory.h
@@ -98,16 +98,16 @@ public:
 		/**
 		 * Allows std::list sorting
 		 */
-		bool operator < (const LLSearchHistory::LLSearchHistoryItem& right);
+		bool operator < (const LLSearchHistory::LLSearchHistoryItem& right) const;
 
 		/**
 		 * Allows std::list sorting
 		 */
-		bool operator > (const LLSearchHistory::LLSearchHistoryItem& right);
+		bool operator > (const LLSearchHistory::LLSearchHistoryItem& right) const;
 
-		bool operator==(const LLSearchHistoryItem& right);
+		bool operator==(const LLSearchHistoryItem& right) const;
 
-		bool operator==(const std::string& right);
+		bool operator==(const std::string& right) const;
 
 		/**
 		 * Serializes search history item to LLSD