diff -upr a/openvdb/openvdb/util/logging.h b/openvdb/openvdb/util/logging.h
--- a/openvdb/openvdb/util/logging.h	2022-11-29 16:33:33.000000000 -0500
+++ b/openvdb/openvdb/util/logging.h	2023-03-17 20:18:25.975572248 -0400
@@ -14,6 +14,7 @@
 #include <log4cplus/layout.h>
 #include <log4cplus/logger.h>
 #include <log4cplus/spi/loggingevent.h>
+#include <log4cplus/version.h>
 #include <algorithm> // for std::remove()
 #include <cstring> // for ::strrchr()
 #include <memory>