diff --git a/PCbuild/pcbuild.sln b/PCbuild/pcbuild.sln
index 78f403ea69d..2c3127b62a1 100644
--- a/PCbuild/pcbuild.sln
+++ b/PCbuild/pcbuild.sln
@@ -684,7 +684,9 @@ Global
 		{7E85ECCF-A72C-4DA4-9E52-884508E80BA1}.Release|x64.ActiveCfg = Release|x64
 		{7E85ECCF-A72C-4DA4-9E52-884508E80BA1}.Release|x64.Build.0 = Release|x64
 		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.Debug|Win32.Build.0 = Debug|Win32
 		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.Debug|x64.ActiveCfg = Debug|x64
+		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.Debug|x64.Build.0 = Debug|x64
 		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.PGInstrument|Win32.ActiveCfg = PGInstrument|Win32
 		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.PGInstrument|Win32.Build.0 = PGInstrument|Win32
 		{C5A3E7FB-9695-4B2E-960B-1D9F43F1E555}.PGInstrument|x64.ActiveCfg = PGInstrument|x64
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 6e5e6beabd7..f37e69d2d23 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -23,7 +23,7 @@
     <opensslDir>$(externalsDir)\openssl-1.0.1e</opensslDir>
     <tclDir>$(externalsDir)\tcl-8.6.1.0</tclDir>
     <tkDir>$(externalsDir)\tk-8.6.1.0</tkDir>
-    <tixDir>$(externalsDir)\tix-8.4.3.3</tixDir>
+    <tixDir>$(externalsDir)\tix-8.4.3.4</tixDir>
     <tcltkDir>$(externalsDir)\tcltk</tcltkDir>
   </PropertyGroup>
   <ItemDefinitionGroup>
diff --git a/Tools/buildbot/external-common.bat b/Tools/buildbot/external-common.bat
index 959fa1af22f..672357cb322 100644
--- a/Tools/buildbot/external-common.bat
+++ b/Tools/buildbot/external-common.bat
@@ -35,7 +35,7 @@ if not exist tcl-8.6.1.0 (
    svn export http://svn.python.org/projects/external/tcl-8.6.1.0
 )
 if not exist tk-8.6.1.0 svn export http://svn.python.org/projects/external/tk-8.6.1.0
-if not exist tix-8.4.3.3 svn export http://svn.python.org/projects/external/tix-8.4.3.3
+if not exist tix-8.4.3.4 svn export http://svn.python.org/projects/external/tix-8.4.3.4
 
 @rem sqlite3
 if not exist sqlite-3.8.3.1 (