diff --git a/gnu/packages/lisp-xyz.scm b/gnu/packages/lisp-xyz.scm
index 490a55a2f76..143285266c4 100644
--- a/gnu/packages/lisp-xyz.scm
+++ b/gnu/packages/lisp-xyz.scm
@@ -22258,7 +22258,7 @@ determination library using @emph{magic} numbers.")
 (define-public sbcl-magicl
   (package
     (name "sbcl-magicl")
-    (version "0.11.0")
+    (version "0.9.1")
     (source
      (origin
        (method git-fetch)
@@ -22267,7 +22267,7 @@ determination library using @emph{magic} numbers.")
              (commit (string-append "v" version))))
        (file-name (git-file-name "cl-magicl" version))
        (sha256
-        (base32 "10scw5qhrgjhfrlia5iqn2yy2zj1d57m45g479vg56lw849whscw"))))
+        (base32 "0x9p55qin399jhr5md88nij8fv78b64xjhww7ys364pkjnx8ak9v"))))
     (build-system asdf-build-system/sbcl)
     (native-inputs (list gfortran sbcl-fiasco))
     (inputs