diff --git a/builds/msvc/vs2010/libzmq/libzmq.vcxproj b/builds/msvc/vs2010/libzmq/libzmq.vcxproj
index 995d84de..3636b3ee 100644
--- a/builds/msvc/vs2010/libzmq/libzmq.vcxproj
+++ b/builds/msvc/vs2010/libzmq/libzmq.vcxproj
@@ -234,7 +234,7 @@
     <ClCompile Include="..\..\..\..\src\tcp_connecter.cpp" />
     <ClCompile Include="..\..\..\..\src\tcp_listener.cpp" />
     <ClCompile Include="..\..\..\..\src\thread.cpp" />
-    <ClInclude Include="..\..\..\..\src\timers.cpp" />
+    <ClCompile Include="..\..\..\..\src\timers.cpp" />
     <ClCompile Include="..\..\..\..\src\trie.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_decoder.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_encoder.cpp" />
diff --git a/builds/msvc/vs2012/libzmq/libzmq.vcxproj b/builds/msvc/vs2012/libzmq/libzmq.vcxproj
index b2612e61..6fa625ed 100644
--- a/builds/msvc/vs2012/libzmq/libzmq.vcxproj
+++ b/builds/msvc/vs2012/libzmq/libzmq.vcxproj
@@ -234,7 +234,7 @@
     <ClCompile Include="..\..\..\..\src\tcp_connecter.cpp" />
     <ClCompile Include="..\..\..\..\src\tcp_listener.cpp" />
     <ClCompile Include="..\..\..\..\src\thread.cpp" />
-    <ClInclude Include="..\..\..\..\src\timers.cpp" />
+    <ClCompile Include="..\..\..\..\src\timers.cpp" />
     <ClCompile Include="..\..\..\..\src\trie.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_decoder.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_encoder.cpp" />
diff --git a/builds/msvc/vs2013/libzmq/libzmq.vcxproj b/builds/msvc/vs2013/libzmq/libzmq.vcxproj
index 47638134..4b126876 100644
--- a/builds/msvc/vs2013/libzmq/libzmq.vcxproj
+++ b/builds/msvc/vs2013/libzmq/libzmq.vcxproj
@@ -234,7 +234,7 @@
     <ClCompile Include="..\..\..\..\src\tcp_connecter.cpp" />
     <ClCompile Include="..\..\..\..\src\tcp_listener.cpp" />
     <ClCompile Include="..\..\..\..\src\thread.cpp" />
-    <ClInclude Include="..\..\..\..\src\timers.cpp" />
+    <ClCompile Include="..\..\..\..\src\timers.cpp" />
     <ClCompile Include="..\..\..\..\src\trie.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_decoder.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_encoder.cpp" />
diff --git a/builds/msvc/vs2015/libzmq/libzmq.vcxproj b/builds/msvc/vs2015/libzmq/libzmq.vcxproj
index c929baa6..bb6a30e3 100644
--- a/builds/msvc/vs2015/libzmq/libzmq.vcxproj
+++ b/builds/msvc/vs2015/libzmq/libzmq.vcxproj
@@ -234,7 +234,7 @@
     <ClCompile Include="..\..\..\..\src\tcp_connecter.cpp" />
     <ClCompile Include="..\..\..\..\src\tcp_listener.cpp" />
     <ClCompile Include="..\..\..\..\src\thread.cpp" />
-    <ClInclude Include="..\..\..\..\src\timers.cpp" />
+    <ClCompile Include="..\..\..\..\src\timers.cpp" />
     <ClCompile Include="..\..\..\..\src\trie.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_decoder.cpp" />
     <ClCompile Include="..\..\..\..\src\v1_encoder.cpp" />