diff --git a/gnu/packages/c.scm b/gnu/packages/c.scm
index c1a028b653..8e51af0346 100644
--- a/gnu/packages/c.scm
+++ b/gnu/packages/c.scm
@@ -671,7 +671,7 @@ communication.")
 (define-public aws-c-io
   (package
     (name "aws-c-io")
-    ; Update only when updating aws-crt-cpp.
+    ;; Update only when updating aws-crt-cpp.
     (version "0.10.20")
     (source (origin
               (method git-fetch)