diff --git a/gnu/packages/databases.scm b/gnu/packages/databases.scm
index 4a520f19ec..8cb2a8738c 100644
--- a/gnu/packages/databases.scm
+++ b/gnu/packages/databases.scm
@@ -1386,6 +1386,7 @@ (define-public rocksdb
      `(#:make-flags (list "CC=gcc" "V=1"
                           ;; Ceph requires that RTTI is enabled.
                           "USE_RTTI=1"
+                          "date=1970-01-01" ; build reproducibly
                           (string-append "INSTALL_PATH="
                                          (assoc-ref %outputs "out"))