diff --git a/cmake/linux/default_libs.cmake b/cmake/linux/default_libs.cmake
index 61d40b4fd04..e5ca8e296fc 100644
--- a/cmake/linux/default_libs.cmake
+++ b/cmake/linux/default_libs.cmake
@@ -8,6 +8,7 @@ set (DEFAULT_LIBS "-nodefaultlibs")
 if (COMPILER_CLANG)
     execute_process (COMMAND ${CMAKE_CXX_COMPILER} --target=${CMAKE_CXX_COMPILER_TARGET} --print-libgcc-file-name --rtlib=compiler-rt OUTPUT_VARIABLE BUILTINS_LIBRARY OUTPUT_STRIP_TRAILING_WHITESPACE)
 
+    # Apparently, in clang-19, the UBSan support library for C++ was moved out into ubsan_standalone_cxx.a, so we have to include both.
     if (SANITIZE STREQUAL undefined)
         string(REPLACE "builtins.a" "ubsan_standalone_cxx.a" EXTRA_BUILTINS_LIBRARY "${BUILTINS_LIBRARY}")
     endif ()