diff --git a/net-dns/libidn/libidn2-2.0.5.recipe b/net-dns/libidn/libidn2-2.0.5.recipe
index d4199bfdf..a27e3d160 100644
--- a/net-dns/libidn/libidn2-2.0.5.recipe
+++ b/net-dns/libidn/libidn2-2.0.5.recipe
@@ -54,6 +54,7 @@ BUILD_PREREQUIRES="
 	cmd:automake
 	cmd:autoheader
 	cmd:gcc$secondaryArchSuffix
+	cmd:gtkdocize
 	cmd:ld$secondaryArchSuffix
 	cmd:libtoolize$secondaryArchSuffix
 	cmd:make