diff --git a/build/hosts/default b/build/hosts/default
index 5b3e284..173dde3 100644
--- a/build/hosts/default
+++ b/build/hosts/default
@@ -155,8 +155,15 @@ endif
 LIBS     += -lhdf5_fortran -lhdf5
 endif
 
-# compression for binary files of the XML+binary format
+# data hashing and compression support for XML+binary format
 #
+ifeq ($(XXHASH),Y)
+FFLAGS   += -DXXHASH
+ifneq ($(XXHASHDIR),)
+LIBS     += -L$(XXHASHDIR)/lib
+endif
+LIBS     += -lxxhash
+endif
 ifeq ($(ZSTD),Y)
 FFLAGS   += -DZSTD
 ifneq ($(ZSTDDIR),)
diff --git a/build/make.default b/build/make.default
index cff3203..3bd5019 100644
--- a/build/make.default
+++ b/build/make.default
@@ -26,12 +26,15 @@ MPI          = N
 #
 OUTPUT       =
 
-# compression support for XML+binary format:
+# data hashing and compression support for XML+binary format:
 #
+#   XXHASH       - use external libxxhash for calculating data digests;
+#                  if XXHASH = N, the internal implementation is used;
 #   ZSTD         - enable support for Zstandard compression;
 #   LZ4          - enable support for LZ4 compression;
 #   LZMA         - enable support for LZMA compression;
 #
+XXHASH       = N
 ZSTD         = N
 LZ4          = N
 LZMA         = N