diff --git a/ares/maketgz b/ares/maketgz
index 2638e2a20992da44a22790af961c9641e07b8624..18d27822e19326e69bceb49e39a01063af08bdc0 100755
--- a/ares/maketgz
+++ b/ares/maketgz
@@ -12,6 +12,10 @@ if(!-f "ares.h") {
     exit;
 }
 
+if(!-f "configure") {
+    `autoconf`;
+}
+
 @files=`find . -name FILES`;
 
 my @entries;