diff --git a/dev-util/gtk_doc/gtk_doc-1.28.recipe b/dev-util/gtk_doc/gtk_doc-1.28.recipe
index 6a1b37c43..ae8d2cb09 100644
--- a/dev-util/gtk_doc/gtk_doc-1.28.recipe
+++ b/dev-util/gtk_doc/gtk_doc-1.28.recipe
@@ -6,7 +6,7 @@ be used to document application code."
 HOMEPAGE="https://www.gtk.org/gtk-doc/"
 COPYRIGHT="2002-2018 Damon Chaplin and Owen Taylor"
 LICENSE="GNU GPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://download.gnome.org/sources/gtk-doc/$portVersion/gtk-doc-$portVersion.tar.xz"
 CHECKSUM_SHA256="911e29e302252c96128965ee1f4067d5431a88e00ad1023a8bc1d6b922af5715"
 SOURCE_DIR="gtk-doc-$portVersion"
@@ -32,7 +32,9 @@ REQUIRES="
 	haiku
 	six_python
 	cmd:perl
+	cmd:pkg_config
 	cmd:python2
+	devel:libglib_2.0
 	"
 
 BUILD_REQUIRES="