diff --git a/configure.ac b/configure.ac
index dd000c022ebc99b24f6a3899b9ebc975786e1e67..bc65cf5c75b34d385e5e56bba8cfb9c86855cbe8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -939,7 +939,9 @@ case "$LIBIDN" in
        AC_CHECK_LIB(idn, idna_to_ascii_lz, ,
                     [
                     dnl if there was a given path, try it
+                    nolibidn="true"
                     if test "x$LIBIDN" != "x"; then
+                      nolibidn="" dnl reset to test again
                       oldLDFLAGS=$LDFLAGS
                       oldCPPFLAGS=$CPPFLAGS
                       LDFLAGS="$LDFLAGS -L$LIBIDN/lib"