diff --git a/common/dns-cert.c b/common/dns-cert.c
index 179bb1524..4e297bf92 100644
--- a/common/dns-cert.c
+++ b/common/dns-cert.c
@@ -44,9 +44,6 @@
 #endif
 #ifdef USE_ADNS
 # include <adns.h>
-# ifndef HAVE_ADNS_FREE
-#  define adns_free free
-# endif
 #endif
 
 #include "util.h"
diff --git a/common/pka.c b/common/pka.c
index 3c45e8bbf..d47216298 100644
--- a/common/pka.c
+++ b/common/pka.c
@@ -48,9 +48,6 @@
 #endif /* USE_DNS_PKA */
 #ifdef USE_ADNS
 # include <adns.h>
-# ifndef HAVE_ADNS_FREE
-#  define adns_free free
-# endif
 #endif
 
 #include "util.h"
diff --git a/common/srv.c b/common/srv.c
index 380e356bd..7a0c42d4f 100644
--- a/common/srv.c
+++ b/common/srv.c
@@ -45,9 +45,6 @@
 #include <time.h>
 #ifdef USE_ADNS
 # include <adns.h>
-# ifndef HAVE_ADNS_FREE
-#  define adns_free free
-# endif
 #endif
 
 #include "util.h"
diff --git a/configure.ac b/configure.ac
index 9afcd3b64..320ee27a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -904,18 +904,14 @@ AC_ARG_WITH(adns,
              fi])
 if test "$with_adns" != "no"; then
   AC_CHECK_HEADERS(adns.h,
-                AC_CHECK_LIB(adns, adns_init,
+                AC_CHECK_LIB(adns, adns_free,
                              [have_adns=yes],
                              [CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags}]),
-                [CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags}])
+                             [CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags}])
 fi
 if test "$have_adns" = "yes"; then
   ADNSLIBS="-ladns"
 fi
-AC_SUBST(ADNSLIBS)
-# Newer adns versions feature a free function to be used under W32.
-AC_CHECK_FUNCS(adns_free)
-
 
 
 #