--- heimdal-1.3.1/cf/check-compile-et.m4.orig
+++ heimdal-1.3.1/cf/check-compile-et.m4
@@ -61,7 +61,7 @@
 elif test "${krb_cv_compile_et}" = "yes"; then
   dnl Since compile_et seems to work, let's check libcom_err
   krb_cv_save_LIBS="${LIBS}"
-  LIBS="${LIBS} -lcom_err"
+  LIBS="${LIBS} -lcom_err -lpthread"
   AC_MSG_CHECKING(for com_err)
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <com_err.h>]],[[
     const char *p;