diff --git a/SPECS/mesa-demos.spec b/SPECS/mesa-demos.spec
index edc1bee..8de541e 100644
--- a/SPECS/mesa-demos.spec
+++ b/SPECS/mesa-demos.spec
@@ -30,6 +30,7 @@ BuildRequires: libGLU-devel
 BuildRequires: glew-devel
 BuildRequires: wayland-devel
 BuildRequires: freetype-devel
+BuildRequires: libXext-devel
 
 %description
 This package provides some demo applications for testing Mesa.