diff -urN libcap-2.25/pam_cap/pam_cap.c libcap-2.25_patched/pam_cap/pam_cap.c

--- libcap-2.25/pam_cap/pam_cap.c	2013-12-16 05:46:28.000000000 +0100

+++ libcap-2.25_patched/pam_cap/pam_cap.c	2019-03-04 16:18:23.440525062 +0100

@@ -286,7 +286,7 @@

     int retval;

     struct pam_cap_s pcs;

-    if (!(flags & PAM_ESTABLISH_CRED)) {

+    if (!(flags & (PAM_ESTABLISH_CRED | PAM_REINITIALIZE_CRED))) {

 	D(("we don't handle much in the way of credentials"));

 	return PAM_IGNORE;

     }