diff --git a/sysconfig.h b/sysconfig.h
index 1f375f33..0a081d11 100644
--- a/sysconfig.h
+++ b/sysconfig.h
@@ -72,7 +72,7 @@
 #endif
 
 #ifndef CAP_ZLIB
-#define CAP_ZLIB (MAXMDIM >= 4)
+#define CAP_ZLIB 1
 #endif
 
 #define CAP_FRAMELIMIT (!ISMOBWEB)