diff --git a/gnu/packages/aspell.scm b/gnu/packages/aspell.scm
index 8e2c7979e9..e8633fcdad 100644
--- a/gnu/packages/aspell.scm
+++ b/gnu/packages/aspell.scm
@@ -299,6 +299,7 @@ (define-public aspell-dict-nl
 (define-public aspell-dict-nn
   (aspell-dictionary "nn" "Norwegian Nynorsk"
                      #:version "0.50.1-1"
+                     #:prefix "aspell-"
                      #:sha256
                      (base32
                       "0w2k5l5rbqpliripgqwiqixz5ghnjf7i9ggbrc4ly4vy1ia10rmc")))