diff --git a/rpm-ostree.spec b/rpm-ostree.spec
index 4937524..25d63e5 100644
--- a/rpm-ostree.spec
+++ b/rpm-ostree.spec
@@ -135,7 +135,7 @@ The %{name}-devel package includes the header files for %{name}-libs.
 %autosetup -Sgit -n %{name}-%{version}
 # We hit "LLVM ERROR: out of memory" with LTO on 32 bit 
 # https://bugzilla.redhat.com/show_bug.cgi?id=1974927
-%if %{__isa_bits} == 32
+%if 0%{?__isa_bits} == 32
 sed -ie 's,^lto = true,# disabled: lto = true,' Cargo.toml
 %endif