diff --git a/gnome-calculator.spec b/gnome-calculator.spec
index 044363d..da5a890 100644
--- a/gnome-calculator.spec
+++ b/gnome-calculator.spec
@@ -10,6 +10,7 @@ Source0:        https://download.gnome.org/sources/%{name}/3.26/%{name}-%{versio
 # https://bugzilla.redhat.com/show_bug.cgi?id=1536368
 Patch0:         0001-Use-_-instead-of-ans-for-last-result-bgo-785107.patch
 
+BuildRequires:  vala
 BuildRequires:  desktop-file-utils
 BuildRequires:  gettext
 BuildRequires:  intltool