1 files changed, 2 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index 2ded490..9fc5c9d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -152,18 +152,18 @@ AC_CHECK_HEADER([expat.h],[
  AC_MSG_ERROR([no required expat library. get one from http://expat.sourceforge.net/])
 ])
 
 AC_CHECK_HEADERS([tidy.h tidy/tidy.h],[
- AC_CHECK_LIB([tidy],[tidyParseBuffer],[
+ test -z "$TIDY_LIBS" && AC_CHECK_LIB([tidy],[tidyParseBuffer],[
   TIDY_LIBS=-ltidy
   TIDY_CFLAGS=
   AC_SUBST([TIDY_LIBS])
   AC_SUBST([TIDY_CFLAGS])
  ],[
   AC_MSG_ERROR([no required htmltidy library found. get one from http://tidy.sourceforge.net/])
  ])
 ],[
- test "$ac_header" = "tidy/tidy.h" \
+ test -z "$TIDY_LIBS" -a "$ac_header" = "tidy/tidy.h" \
  && AC_MSG_ERROR([no required htmltidy library found. get one from http://tidy.sourceforge.net/])
 ])
 
 if test -n "$PCRE_LIBS" -a -n "$PCRE_CFLAGS" ; then