diff --git a/gnome-calculator.spec b/gnome-calculator.spec
index 6346322..88ac5ad 100644
--- a/gnome-calculator.spec
+++ b/gnome-calculator.spec
@@ -18,6 +18,7 @@ BuildRequires: flex
 BuildRequires: bison
 BuildRequires: intltool
 BuildRequires: itstool
+BuildRequires: gtksourceview3-devel
 
 Requires(post): glib2
 Requires(postun): glib2