diff --git a/sugar-physics.spec b/sugar-physics.spec
index df9b819..dd000dc 100644
--- a/sugar-physics.spec
+++ b/sugar-physics.spec
@@ -7,8 +7,9 @@ License:        GPLv3+
 URL:            http://wiki.sugarlabs.org/go/Activities/Physics
 Source0:        https://download.sugarlabs.org/sources/honey/Physics/Physics-%{version}.tar.bz2
 
-BuildRequires:  sugar-toolkit-gtk3
 BuildRequires:  gettext
+BuildRequires:  python3-devel
+BuildRequires:  sugar-toolkit-gtk3
 Requires:       sugar
 Requires:       python3-pybox2d
 BuildArch:      noarch