diff --git a/src/BookmarkMgr.cpp b/src/BookmarkMgr.cpp
index a9db129a..8d94126d 100644
--- a/src/BookmarkMgr.cpp
+++ b/src/BookmarkMgr.cpp
@@ -389,7 +389,7 @@ BookmarkList BookmarkMgr::getBookmarks(std::string group) {
     }
     
     if (!bmDataSorted[group]) {
-        std::sort(bmData[group].begin(), bmData[group].end(), BookmarkEntryCompare());
+		std::sort(bmData[group].begin(), bmData[group].end(), [](const BookmarkEntryPtr a, const BookmarkEntryPtr b) -> bool { return a->frequency < b->frequency;});
         bmDataSorted[group] = true;
     }
     
@@ -538,7 +538,7 @@ BookmarkRangeList BookmarkMgr::getRanges() {
     std::lock_guard < std::recursive_mutex > lock(busy_lock);
 
     if (!rangesSorted) {
-        std::sort(ranges.begin(), ranges.end(), BookmarkRangeEntryCompare());
+        std::sort(ranges.begin(), ranges.end(), [](const BookmarkRangeEntryPtr a, const BookmarkRangeEntryPtr b) -> bool { return a->freq < b->freq;});
         rangesSorted = true;
     }
     
diff --git a/src/BookmarkMgr.h b/src/BookmarkMgr.h
index 4a96777f..d64dba84 100644
--- a/src/BookmarkMgr.h
+++ b/src/BookmarkMgr.h
@@ -48,23 +48,6 @@ class BookmarkRangeEntry {
 typedef std::shared_ptr<BookmarkEntry> BookmarkEntryPtr;
 typedef std::shared_ptr<BookmarkRangeEntry> BookmarkRangeEntryPtr;
 
-struct BookmarkEntryCompare : public std::binary_function<BookmarkEntryPtr,BookmarkEntryPtr,bool>
-{
-    bool operator()(const BookmarkEntryPtr a, BookmarkEntryPtr b) const
-    {
-        return a->frequency < b->frequency;
-    }
-};
-
-
-struct BookmarkRangeEntryCompare : public std::binary_function<BookmarkRangeEntryPtr ,BookmarkRangeEntryPtr ,bool>
-{
-    bool operator()(const BookmarkRangeEntryPtr a, BookmarkRangeEntryPtr b) const
-    {
-        return a->freq < b->freq;
-    }
-};
-
 typedef std::vector<BookmarkEntryPtr> BookmarkList;
 typedef std::vector<BookmarkRangeEntryPtr> BookmarkRangeList;
 typedef std::map<std::string, BookmarkList > BookmarkMap;
diff --git a/src/IOThread.h b/src/IOThread.h
index fc5a570c..39b00a33 100644
--- a/src/IOThread.h
+++ b/src/IOThread.h
@@ -17,7 +17,7 @@
 #include "Timer.h"
 #include "SpinMutex.h"
 
-struct map_string_less : public std::binary_function<std::string,std::string,bool>
+struct map_string_less
 {
     bool operator()(const std::string& a,const std::string& b) const
     {
diff --git a/src/util/DataTree.h b/src/util/DataTree.h
index c27e7a9a..b99195e4 100755
--- a/src/util/DataTree.h
+++ b/src/util/DataTree.h
@@ -37,7 +37,7 @@ using namespace std;
 
 
 /* map comparison function */
-struct string_less : public std::binary_function<std::string,std::string,bool>
+struct string_less
 {
  bool operator()(const std::string& a,const std::string& b) const
  {
@@ -45,14 +45,6 @@ struct string_less : public std::binary_function<std::string,std::string,bool>
  }
 };
 
-/* int comparison function */
-struct int_less : public std::binary_function<int,int,bool>
-{
- bool operator()(int a,int b) const
- {
-        return a < b;
- }
-};
 
 
 /* Data Exceptions */