Fix sanity
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 584dd0a..7eff006 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -1040,6 +1040,7 @@
 src/core/lib/support/string_windows.h \
 src/core/lib/support/time_precise.h \
 src/core/lib/support/tmpfile.h \
+src/core/lib/support/vector.h \
 src/core/lib/surface/alarm_internal.h \
 src/core/lib/surface/api_trace.h \
 src/core/lib/surface/call.h \