--- autoconf/configure.in.orig	2024-03-22 09:48:41 UTC
+++ autoconf/configure.in
@@ -982,8 +982,10 @@ if test x"${error}" == "x"; then
 
 if test x"${error}" == "x"; then
    support_curl=yes
-fi 
+fi
 
+unset error
+
 AC_MSG_RESULT([$support_curl])
 if test "$support_curl" = "yes"; then
    AC_DEFINE(HAVE_CURL, 1, [Define if CURL library is available])
@@ -1042,6 +1044,8 @@ fi
     ZSTD_LIBS=""
     ZSTD_INC=""
 fi
+
+unset error
 
 AC_MSG_RESULT([$support_zstd])
 if test "$support_zstd" = "yes"; then