diff --git a/.gitignore b/.gitignore
index a558cf67..f740859e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *.[oa]
 *.so
 *.so.*
+*.dylib
 *.backup
 *.elc
 *.gcov
diff --git a/src/account.h b/src/account.h
index 4a4041b7..7411dfc2 100644
--- a/src/account.h
+++ b/src/account.h
@@ -261,7 +261,11 @@ public:
   mutable optional<xdata_t> xdata_;
 
   bool has_xdata() const {
+#if BOOST_VERSION >= 105600
     return xdata_ != NULL;
+#else
+    return xdata_;
+#endif
   }
   void clear_xdata();
   xdata_t& xdata() {
diff --git a/src/item.h b/src/item.h
index d194ac07..767a0715 100644
--- a/src/item.h
+++ b/src/item.h
@@ -191,7 +191,11 @@ public:
   static bool use_aux_date;
 
   virtual bool has_date() const {
+#if BOOST_VERSION >= 105600
     return _date != NULL;
+#else
+    return _date;
+#endif
   }
 
   virtual date_t date() const {
diff --git a/src/post.h b/src/post.h
index c4fc3827..d04be266 100644
--- a/src/post.h
+++ b/src/post.h
@@ -205,7 +205,11 @@ public:
   mutable optional<xdata_t> xdata_;
 
   bool has_xdata() const {
+#if BOOST_VERSION >= 105600
     return xdata_ != NULL;
+#else
+    return xdata_;
+#endif
   }
   void clear_xdata() {
     xdata_ = none;
diff --git a/src/ptree.cc b/src/ptree.cc
index fa6a1db9..3fc9ace6 100644
--- a/src/ptree.cc
+++ b/src/ptree.cc
@@ -80,7 +80,12 @@ void format_ptree::flush()
 
   switch (format) {
   case FORMAT_XML:
+#if BOOST_VERSION >= 105600
     auto indented = property_tree::xml_writer_make_settings<std::string> (' ', 2);
+#else
+    property_tree::xml_writer_settings<char> indented(' ', 2);
+#endif
+
     property_tree::write_xml(out, pt, indented);
     out << std::endl;
     break;
diff --git a/src/times.h b/src/times.h
index d2f7bb19..00007580 100644
--- a/src/times.h
+++ b/src/times.h
@@ -568,7 +568,11 @@ public:
   void   stabilize(const optional<date_t>& date = none);
 
   bool   is_valid() const {
+#if BOOST_VERSION >= 105600
     return start != NULL;
+#else
+    return start;
+#endif
   }
 
   /** Find the current or next period containing date.  Returns false if