diff --git a/guix/build/ruby-build-system.scm b/guix/build/ruby-build-system.scm
index 63c94765f7..c957a61115 100644
--- a/guix/build/ruby-build-system.scm
+++ b/guix/build/ruby-build-system.scm
@@ -128,7 +128,7 @@ is #f."
 (define* (install #:key inputs outputs (gem-flags '())
                   #:allow-other-keys)
   "Install the gem archive SOURCE to the output store item.  Additional
-GEM-FLAGS are passed to the 'gem' invokation, if present."
+GEM-FLAGS are passed to the 'gem' invocation, if present."
   (let* ((ruby-version
           (match:substring (string-match "ruby-(.*)\\.[0-9]$"
                                          (assoc-ref inputs "ruby"))