diff --git a/spl-modules.spec.in b/spl-modules.spec.in
index 7740d9422..0c3dd10a9 100644
--- a/spl-modules.spec.in
+++ b/spl-modules.spec.in
@@ -168,7 +168,7 @@ Version:         %{version}
 Release:         %{release}
 License:         @LICENSE@
 URL:             git://eris.llnl.gov/spl.git
-BuildRoot:       %{_tmppath}/%{name}-%{version}-%{release}-%(%{__id_u} -n)
+BuildRoot:       %{_tmppath}/%{name}-%{version}-%{release}-%(%{__id} -un)
 Source:          @PACKAGE@-%{version}.tar.gz
 Requires:        %{requires}
 BuildRequires:   %{kdevpkg}
diff --git a/spl.spec.in b/spl.spec.in
index 34207f626..fcb3dcfc8 100644
--- a/spl.spec.in
+++ b/spl.spec.in
@@ -10,7 +10,7 @@ Version:         %{version}
 Release:         %{release}
 License:         @LICENSE@
 URL:             git://eris.llnl.gov/spl.git
-BuildRoot:       %{_tmppath}/%{name}-%{version}-%{release}-%(%{__id_u} -n)
+BuildRoot:       %{_tmppath}/%{name}-%{version}-%{release}-%(%{__id} -un)
 Source:          %{name}-%{version}.tar.gz
 
 %description