diff --git a/gnu/packages/crypto.scm b/gnu/packages/crypto.scm
index 9522d5aa50..67ced6ff4b 100644
--- a/gnu/packages/crypto.scm
+++ b/gnu/packages/crypto.scm
@@ -783,6 +783,7 @@ (define-public crypto++
                      (apply invoke "make" target jobs make-flags)
                      (apply invoke "make" "libcryptopp.pc" jobs
                             make-flags)))))))
+    (properties '((tunable? . #t)))
     (native-inputs
      (list unzip))
     (home-page "https://cryptopp.com/")