--- liblbxutil-1.1.0/src/lbx_zlib/lbx_zlib.h.old	2009-11-02 23:52:21.000000000 -0600
+++ liblbxutil-1.1.0/src/lbx_zlib/lbx_zlib.h	2024-05-29 21:33:09.169332780 -0500
@@ -136,9 +136,9 @@
 #endif
 
 /* lbx_zlib.c */
-unsigned long stream_out_compressed;
-unsigned long stream_out_uncompressed;
-unsigned long stream_out_plain;
-unsigned long stream_in_compressed;
-unsigned long stream_in_uncompressed;
-unsigned long stream_in_plain;
+extern unsigned long stream_out_compressed;
+extern unsigned long stream_out_uncompressed;
+extern unsigned long stream_out_plain;
+extern unsigned long stream_in_compressed;
+extern unsigned long stream_in_uncompressed;
+extern unsigned long stream_in_plain;