diff --git a/src/Internat.cpp b/src/Internat.cpp
index 6abcb98d9..5f7fd3f3e 100644
--- a/src/Internat.cpp
+++ b/src/Internat.cpp
@@ -305,6 +305,6 @@ wxArrayString LocalizedStrings(
 {
    wxArrayString results;
    std::transform( strings, strings + nStrings, std::back_inserter(results),
-                   std::mem_fun_ref( &IdentInterfaceSymbol::Translation ) );
+                   std::mem_fn( &IdentInterfaceSymbol::Translation ) );
    return results;
 }
diff --git a/src/MemoryX.h b/src/MemoryX.h
index a68eecf83..d662b6ea3 100644
--- a/src/MemoryX.h
+++ b/src/MemoryX.h
@@ -600,7 +600,7 @@ struct IteratorRange : public std::pair<Iterator, Iterator> {
       R2 (C :: * pmf) () const
    ) const
    {
-      return this->accumulate( init, binary_op, std::mem_fun( pmf ) );
+      return this->accumulate( init, binary_op, std::mem_fn( pmf ) );
    }
 
    // Some accumulations frequent enough to be worth abbreviation:
@@ -623,7 +623,7 @@ struct IteratorRange : public std::pair<Iterator, Iterator> {
    >
    R min( R2 (C :: * pmf) () const ) const
    {
-      return this->min( std::mem_fun( pmf ) );
+      return this->min( std::mem_fn( pmf ) );
    }
 
    template<
@@ -646,7 +646,7 @@ struct IteratorRange : public std::pair<Iterator, Iterator> {
    >
    R max( R2 (C :: * pmf) () const ) const
    {
-      return this->max( std::mem_fun( pmf ) );
+      return this->max( std::mem_fn( pmf ) );
    }
 
    template<
@@ -668,7 +668,7 @@ struct IteratorRange : public std::pair<Iterator, Iterator> {
    >
    R sum( R2 (C :: * pmf) () const ) const
    {
-      return this->sum( std::mem_fun( pmf ) );
+      return this->sum( std::mem_fn( pmf ) );
    }
 };
 
diff --git a/src/ondemand/ODDecodeFFmpegTask.cpp b/src/ondemand/ODDecodeFFmpegTask.cpp
index e291e5dce..45c687cdd 100644
--- a/src/ondemand/ODDecodeFFmpegTask.cpp
+++ b/src/ondemand/ODDecodeFFmpegTask.cpp
@@ -119,7 +119,7 @@ auto ODDecodeFFmpegTask::FromList(const std::list<TrackHolders> &channels) -> St
          Channels channels;
          channels.reserve(holders.size());
          transform(holders.begin(), holders.end(), back_inserter(channels),
-            mem_fun_ref(&TrackHolders::value_type::get)
+            mem_fn(&TrackHolders::value_type::get)
          );
          return channels;
       }