diff -urN ../exim-4.90.orig/src/EDITME ./src/EDITME
--- ../exim-4.90.orig/src/EDITME	2017-12-13 00:14:38.000000000 +0200
+++ ./src/EDITME	2018-01-14 14:22:47.471968000 +0200
@@ -635,7 +635,7 @@
 # AUTH_GSASL=yes
 # AUTH_GSASL_PC=libgsasl
 # AUTH_HEIMDAL_GSSAPI=yes
-# AUTH_HEIMDAL_GSSAPI_PC=heimdal-gssapi
+AUTH_HEIMDAL_GSSAPI_PC=heimdal-gssapi
 # AUTH_HEIMDAL_GSSAPI_PC=heimdal-gssapi heimdal-krb5
 # AUTH_PLAINTEXT=yes
 # AUTH_SPA=yes
@@ -655,6 +655,7 @@
 # AUTH_LIBS=-lsasl2
 # AUTH_LIBS=-lgsasl
 # AUTH_LIBS=-lgssapi -lheimntlm -lkrb5 -lhx509 -lcom_err -lhcrypto -lasn1 -lwind -lroken -lcrypt
+AUTH_LIBS=-lgssapi -lheimntlm -lkrb5 -lhx509 -lcom_err -lgssapi_krb5 -lasn1 -lwind -lroken -lcrypt
 
 
 #------------------------------------------------------------------------------