diff -Nru libsolv-0.7.5/src/rules.c libsolv-0.7.5.patched/src/rules.c
--- libsolv-0.7.5/src/rules.c	2019-06-22 17:43:42.000000000 +0200
+++ libsolv-0.7.5.patched/src/rules.c	2019-06-23 19:29:11.527890506 +0200
@@ -1016,6 +1016,9 @@
 		    p = 0;
 		  if (s->name == ps->name)
 		    {
+		      /* x86-64: allow cohexistence with x86 arch packages */
+		      if (ps->arch != s->arch)
+			continue;
 		      /* optimization: do not add the same-name conflict rule if it was
 		       * already added when we looked at the other package.
 		       * (this assumes pool_colormatch is symmetric) */