diff --git a/utils/bazel/llvm_configs/config.h.cmake b/utils/bazel/llvm_configs/config.h.cmake
index ce83de8e4cba..94fde52de11b 100644
--- a/utils/bazel/llvm_configs/config.h.cmake
+++ b/utils/bazel/llvm_configs/config.h.cmake
@@ -242,6 +242,9 @@
 /* Define if ICU library is available */
 #cmakedefine01 HAVE_ICU
 
+/* Define if Windows vendored ICU is available */
+#cmakedefine01 HAVE_WINDOWS_ICU
+
 /* Define if iconv library is available */
 #cmakedefine01 HAVE_ICONV