diff --git a/configure.ac b/configure.ac
index 95ec4c1..67fa771 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1157,6 +1157,8 @@ if test x$ac_brotli != xno; then
     fi
 else
     AC_MSG_RESULT(no)
+    with_libbrotlienc=no
+    with_libbrotlidec=no
 fi
 AM_CONDITIONAL(HAVE_LIBBROTLI, test "$with_libbrotlienc" != "no" && test "$with_libbrotlidec" != "no")
 
@@ -1202,6 +1204,7 @@ if test x$ac_zstd != xno; then
     fi
 else
     AC_MSG_RESULT(no)
+    with_libzstd=no
 fi
 AM_CONDITIONAL(HAVE_LIBZSTD, test "$with_libzstd" != "no")