diff --git a/nbdkit.spec b/nbdkit.spec
index 06f1d6c..9bb9178 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -252,9 +252,10 @@ make check
 %endif
 
 
+%ifarch %{ocaml_native_compiler}
 %post plugin-ocaml -p /sbin/ldconfig
-
 %postun plugin-ocaml -p /sbin/ldconfig
+%endif
 
 
 %files