diff --git a/pkgs/racket-build-guide/contribute.scrbl b/pkgs/racket-build-guide/contribute.scrbl
index 02bb27f2af..2a2346edab 100644
--- a/pkgs/racket-build-guide/contribute.scrbl
+++ b/pkgs/racket-build-guide/contribute.scrbl
@@ -186,7 +186,7 @@ make that process faster by keeping a few guidelines in mind:
 
        On *nix systems, extensions that are part of the @exec{_DEFAULT_SOURCE}
        pre-processor flag are also allowed. See the
-       @hyperlink[https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html#index-_005fDEFAULT_005fSOURCE]{glibc}
+       @hyperlink["https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html#index-_005fDEFAULT_005fSOURCE"]{glibc}
        manual for more details.}
 
 ]