diff -ru rpm-4.15.1.orig/lib/rpmchroot.c rpm-4.15.1/lib/rpmchroot.c
--- rpm-4.15.1.orig/lib/rpmchroot.c	2019-11-13 10:19:29.309710594 +0100
+++ rpm-4.15.1/lib/rpmchroot.c	2020-01-04 18:36:56.323408444 +0100
@@ -66,7 +66,7 @@
 	setup_map("/proc/self/gid_map", 0, gid);
 	unshared = 1;
     }
-    rpmlog(RPMLOG_DEBUG, "user ns: %d original user %d:%d current %d:%d\n",
+    rpmlog(RPMLOG_DEBUG, "user ns: %d original user %ld:%ld current %ld:%ld\n",
 	    unshared, uid, gid, getuid(), getgid());
 }
 #else