diff --git a/rpm/osg-build.spec b/rpm/osg-build.spec
index 7e792d3d..09f06724 100644
--- a/rpm/osg-build.spec
+++ b/rpm/osg-build.spec
@@ -21,6 +21,7 @@ Requires:       %{name}-koji = %{version}
 BuildRequires:       git
 %else
 BuildRequires:       git-core
+BuildRequires:       python3
 %endif