diff --git a/python-dask.spec b/python-dask.spec
index 859176c..5fdedf6 100644
--- a/python-dask.spec
+++ b/python-dask.spec
@@ -159,7 +159,7 @@ rm -rf html/.{doctrees,buildinfo}
 %global have_arm 1
 %endif
 
-%ifarch %{ix86}
+%if 0%{?__isa_bits} == 32
 # read_sql_query with meta converts dtypes from 32 to 64.
 # https://github.com/dask/dask/issues/8620