diff --git a/build/vc100/turtle_test.vcxproj b/build/vc100/turtle_test.vcxproj
index a6aed44..9de3d6d 100644
--- a/build/vc100/turtle_test.vcxproj
+++ b/build/vc100/turtle_test.vcxproj
@@ -19,10 +19,13 @@
     </ProjectConfiguration>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="..\..\test\defined.hpp" />
     <ClInclude Include="..\..\test\mock_error.hpp" />
     <ClInclude Include="..\..\test\undefined.hpp" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\test\defined_1.cpp" />
+    <ClCompile Include="..\..\test\defined_2.cpp" />
     <ClCompile Include="..\..\test\detail\test_function.cpp" />
     <ClCompile Include="..\..\test\detail\test_invocation.cpp" />
     <ClCompile Include="..\..\test\detail\test_is_functor.cpp" />
diff --git a/build/vc100/turtle_test.vcxproj.filters b/build/vc100/turtle_test.vcxproj.filters
index 2796c51..de84e75 100644
--- a/build/vc100/turtle_test.vcxproj.filters
+++ b/build/vc100/turtle_test.vcxproj.filters
@@ -16,6 +16,9 @@
     <ClInclude Include="..\..\test\undefined.hpp">
       <Filter>Source Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\test\defined.hpp">
+      <Filter>Source Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\test\test_constraints.cpp">
@@ -66,5 +69,11 @@
     <ClCompile Include="..\..\test\test_exception.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\test\defined_1.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\defined_2.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/doc/changelog.qbk b/doc/changelog.qbk
index 87bec51..5385128 100644
--- a/doc/changelog.qbk
+++ b/doc/changelog.qbk
@@ -12,6 +12,7 @@ Not yet released
 
 * Fixed missing thread synchronization in mock::sequence
 * Fixed build errors with Boost 1.59
+* Fixed multiply defined symbol definition for MOCK_FUNCTION included from several translation units
 
 [endsect]
 
diff --git a/include/turtle/mock.hpp b/include/turtle/mock.hpp
index 9f27d0a..b7c9f65 100644
--- a/include/turtle/mock.hpp
+++ b/include/turtle/mock.hpp
@@ -163,7 +163,7 @@
 
 #define MOCK_FUNCTION_AUX(F, n, S, t, s, tpn) \
     MOCK_FUNCTION_HELPER(S, t, s, tpn) \
-    s inline MOCK_DECL(F, n, S,,tpn) \
+    s MOCK_DECL(F, n, S,,tpn) \
     { \
         BOOST_MPL_ASSERT_RELATION( n, ==, \
             boost::function_types::function_arity< \
@@ -210,7 +210,8 @@
 #define MOCK_FUNCTION(F, n, ...) \
     MOCK_FUNCTION_AUX(F, n, \
         MOCK_VARIADIC_ELEM_0(__VA_ARGS__), \
-        MOCK_VARIADIC_ELEM_1(__VA_ARGS__, F),,)
+        MOCK_VARIADIC_ELEM_1(__VA_ARGS__, F), \
+        inline,)
 
 #define MOCK_STATIC_METHOD(F, n, ...) \
     MOCK_FUNCTION_AUX(F, n, \
@@ -231,10 +232,11 @@
     MOCK_METHOD_EXT(M, n, M##_sig_type, M)
 
 #define MOCK_FUNCTION(F, n, S, t) \
-    MOCK_FUNCTION_AUX(F, n, S, t,,)
+    MOCK_FUNCTION_AUX(F, n, S, t, inline,)
 
 #define MOCK_STATIC_METHOD(F, n, S, t) \
     MOCK_FUNCTION_AUX(F, n, S, t, static,)
+
 #define MOCK_STATIC_METHOD_TPL(F, n, S, t) \
     MOCK_FUNCTION_AUX(F, n, S, t, static, typename)
 
diff --git a/test/Jamfile.jam b/test/Jamfile.jam
index 8bc7a52..3eccba2 100644
--- a/test/Jamfile.jam
+++ b/test/Jamfile.jam
@@ -25,12 +25,12 @@ alias mock_inspect :
 
 rule run-test ( name )
 {
-  run $(name) undefined.cpp /boost//unit_test_framework : : : : $(name)_ ;
-  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_MAX_ARGS=21 : $(name)_max_args ;
-  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_USE_CONVERSIONS : $(name)_use_conversions ;
-  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_DECLTYPE : $(name)_no_decltype ;
-  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_VARIADIC_MACROS : $(name)_no_variadic_macros ;
-  run $(name) undefined.cpp /boost//unit_test_framework /boost//thread : : : <define>MOCK_THREAD_SAFE <define>BOOST_THREAD_USES_MOVE <threading>multi : $(name)_thread_safe ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : : $(name)_ ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_MAX_ARGS=21 : $(name)_max_args ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_USE_CONVERSIONS : $(name)_use_conversions ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_DECLTYPE : $(name)_no_decltype ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_VARIADIC_MACROS : $(name)_no_variadic_macros ;
+  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework /boost//thread : : : <define>MOCK_THREAD_SAFE <define>BOOST_THREAD_USES_MOVE <threading>multi : $(name)_thread_safe ;
 }
 
 rule run-tests
diff --git a/test/defined.hpp b/test/defined.hpp
new file mode 100644
index 0000000..e0587f6
--- /dev/null
+++ b/test/defined.hpp
@@ -0,0 +1,20 @@
+// http://turtle.sourceforge.net
+//
+// Copyright Mathieu Champlon 2015
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef MOCK_TEST_DEFINED_HPP_INCLUDED
+#define MOCK_TEST_DEFINED_HPP_INCLUDED
+
+#ifdef BOOST_AUTO_TEST_MAIN
+#undef BOOST_AUTO_TEST_MAIN
+#endif
+
+#include <turtle/mock.hpp>
+
+MOCK_FUNCTION( f, 0, void(), f )
+
+#endif // MOCK_TEST_DEFINED_HPP_INCLUDED
diff --git a/test/defined_1.cpp b/test/defined_1.cpp
new file mode 100644
index 0000000..7c66fd1
--- /dev/null
+++ b/test/defined_1.cpp
@@ -0,0 +1,9 @@
+// http://turtle.sourceforge.net
+//
+// Copyright Mathieu Champlon 2015
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include "defined.hpp"
diff --git a/test/defined_2.cpp b/test/defined_2.cpp
new file mode 100644
index 0000000..7c66fd1
--- /dev/null
+++ b/test/defined_2.cpp
@@ -0,0 +1,9 @@
+// http://turtle.sourceforge.net
+//
+// Copyright Mathieu Champlon 2015
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include "defined.hpp"