diff --git a/lib/krb5/Makefile.am b/lib/krb5/Makefile.am
index dc203e83d..2fd5a0ffd 100644
--- a/lib/krb5/Makefile.am
+++ b/lib/krb5/Makefile.am
@@ -2,7 +2,7 @@
 
 include $(top_srcdir)/Makefile.am.common
 
-INCLUDES += $(INCLUDE_krb4) $(INCLUDE_des)
+INCLUDES += $(INCLUDE_krb4) $(INCLUDE_des) -I../com_err
 
 bin_PROGRAMS = verify_krb5_conf