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--- a/src/common/autoconfig.h.in
+++ b/src/common/autoconfig.h.in
@@ -32,6 +32,9 @@
 
 /* Define to 1 if you have the `pthread' library (-lpthread). */
 #undef HAVE_LIBPTHREAD
+
+/* Define to 1 if you have the `z' library (-lz). */
+#undef HAVE_LIBZ
 
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H