diff --git a/doc/08_revision_history.dox b/doc/08_revision_history.dox
index 5084f11e..cbab2554 100644
--- a/doc/08_revision_history.dox
+++ b/doc/08_revision_history.dox
@@ -1,5 +1,13 @@
 /*! \page revisions Revision History
 
+DynaMix 1.3.9
+=============
+
+Released: 2019 Nov 4
+
+- Fixed a typo which prevented move assignment of mixins which are not move-constructible
+
+
 DynaMix 1.3.8
 =============
 
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 0a33aa06..6b5799ae 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -6,7 +6,7 @@
 
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "DynaMix"
-PROJECT_NUMBER         = 1.3.8
+PROJECT_NUMBER         = 1.3.9
 PROJECT_BRIEF          = "A new take on polymorphism in C++"
 
 # TODO: (max size 200x55)
diff --git a/include/dynamix/mixin_type_info.hpp b/include/dynamix/mixin_type_info.hpp
index 1ca78872..b9f84c5f 100644
--- a/include/dynamix/mixin_type_info.hpp
+++ b/include/dynamix/mixin_type_info.hpp
@@ -245,7 +245,7 @@ typename std::enable_if<std::is_move_assignable<Mixin>::value,
 }
 
 template <typename Mixin>
-typename std::enable_if<!std::is_move_constructible<Mixin>::value,
+typename std::enable_if<!std::is_move_assignable<Mixin>::value,
     mixin_move_proc>::type get_mixin_move_assignment()
 {
     return nullptr;
diff --git a/include/dynamix/version.hpp b/include/dynamix/version.hpp
index b43b1c14..21686fb6 100644
--- a/include/dynamix/version.hpp
+++ b/include/dynamix/version.hpp
@@ -14,7 +14,7 @@
 
 #define DYNAMIX_VERSION_MAJOR 1
 #define DYNAMIX_VERSION_MINOR 3
-#define DYNAMIX_VERSION_SUB_MINOR 8
+#define DYNAMIX_VERSION_SUB_MINOR 9
 
 /// The library's version.
 ///
diff --git a/test/mixin_move.cpp b/test/mixin_move.cpp
index ffb1bfe5..1b694bec 100644
--- a/test/mixin_move.cpp
+++ b/test/mixin_move.cpp
@@ -32,7 +32,7 @@ class custom_mv
     custom_mv& operator=(const custom_mv&) = delete;
     ~custom_mv() = default;
 
-    custom_mv(custom_mv&& other) = default;
+    custom_mv(custom_mv&& other) = delete;
 
     custom_mv& operator=(custom_mv&& other)
     {