diff --git a/python-cramjam.spec b/python-cramjam.spec
index f179f39..1a226e6 100644
--- a/python-cramjam.spec
+++ b/python-cramjam.spec
@@ -1,5 +1,8 @@
 %bcond tests 1
 
+# isa-l is ExcludeArch: i686
+%bcond isal %[ 0%{?__isa_bits} != 32 ]
+
 Name:           python-cramjam
 Version:        2.9.1
 Release:        %autorelease
@@ -34,9 +37,6 @@ Source1:        get_source
 # https://github.com/milesgranger/cramjam/pull/196
 Patch:          %{url}/pull/196.patch
 
-# https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval
-ExcludeArch:    %{ix86}
-
 BuildRequires:  python3-devel
 BuildRequires:  tomcli
 BuildRequires:  cargo-rpm-macros >= 24
@@ -113,6 +113,20 @@ done
 # unavailable blosc2 crate feature.
 tomcli set Cargo.toml del 'features.wasm32-compat'
 
+%if %{without isal}
+tomcli set Cargo.toml lists delitem --type regex \
+    'features.default' 'i(gzip|deflate|zlib)'
+isal_features="$(
+  tomcli get Cargo.toml features -F newline-keys |
+    grep -E '^i(gzip|deflate|zlib)|-isal-' |
+    tr '\n' ' '
+)"
+for sf in ${isal_features}
+do
+  tomcli set Cargo.toml del "features.${sf}"
+done
+%endif
+
 %cargo_prep