diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index ea73186c20..a411650828 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -9176,14 +9176,14 @@ proteomics packages.")
 (define-public r-mzr
   (package
     (name "r-mzr")
-    (version "2.18.0")
+    (version "2.18.1")
     (source
      (origin
        (method url-fetch)
        (uri (bioconductor-uri "mzR" version))
        (sha256
         (base32
-         "0g5r6yk4gyz0xdwlmrcij4zv7apdgsgygr043095l33hard6nsl5"))
+         "1pr1pcrg3r3pccm5ag6l8ic6rpqbk9jnlb9mm7g4ak5jwrajbzjq"))
        (modules '((guix build utils)))
        (snippet
         '(begin
@@ -9204,7 +9204,8 @@ proteomics packages.")
 -lboost_iostreams -lboost_thread -lboost_filesystem -lboost_chrono\n")))
              #t)))))
     (inputs
-     `(;; XXX Boost 1.69 will not work here.
+     `(;; Our default boost package won't work here, unfortunately, even with
+       ;; mzR version 2.18.1.
        ("boost" ,boost-for-mysql) ; use this instead of the bundled boost sources
        ("zlib" ,zlib)))
     (propagated-inputs