diff --git a/blanket.spec b/blanket.spec
index 1338166..3794e91 100644
--- a/blanket.spec
+++ b/blanket.spec
@@ -28,6 +28,7 @@ BuildRequires:  appstream-glib-devel
 #BuildRequires:  libadwaita-devel
 BuildRequires:  libhandy-devel
 BuildRequires:  blueprint-compiler
+BuildRequires:  gtk4-devel
 BuildRequires:  meson
 BuildRequires:  ninja
 BuildRequires:  pkgconfig