diff --git a/utils/build.ps1 b/utils/build.ps1
index 4c11f0e8c0775..05b9e9f115295 100644
--- a/utils/build.ps1
+++ b/utils/build.ps1
@@ -1350,7 +1350,7 @@ function Build-BuildTools($Arch) {
     -Bin (Get-BuildProjectBinaryCache BuildTools) `
     -Arch $Arch `
     -UseMSVCCompilers C,CXX `
-    -BuildTargets llvm-tblgen,clang-tblgen,clang-tidy-confusable-chars-gen,lldb-tblgen,llvm-config,swift-def-to-strings-converter,swift-serialize-diagnostics,swift-compatibility-symbols `
+    -BuildTargets llvm-tblgen,clang-tblgen,clang-pseudo-gen,clang-tidy-confusable-chars-gen,lldb-tblgen,llvm-config,swift-def-to-strings-converter,swift-serialize-diagnostics,swift-compatibility-symbols `
     -Defines @{
       CMAKE_CROSSCOMPILING = "NO";
       LLDB_ENABLE_PYTHON = "NO";
diff --git a/utils/swift_build_support/swift_build_support/products/llvm.py b/utils/swift_build_support/swift_build_support/products/llvm.py
index b6a6bcb33a018..44ebe24e5919e 100644
--- a/utils/swift_build_support/swift_build_support/products/llvm.py
+++ b/utils/swift_build_support/swift_build_support/products/llvm.py
@@ -382,6 +382,8 @@ def build(self, host_target):
                                                 'clang-tidy-confusable-chars-gen')
             llvm_cmake_options.define('CLANG_TIDY_CONFUSABLE_CHARS_GEN',
                                       confusable_chars_gen)
+            pseudo_gen = os.path.join(host_build_dir, 'bin', 'clang-pseudo-gen')
+            llvm_cmake_options.define('CLANG_PSEUDO_GEN', pseudo_gen)
             llvm = os.path.join(host_build_dir, 'llvm')
             llvm_cmake_options.define('LLVM_NATIVE_BUILD', llvm)