--- origsrc/savi1.5.1/src/Makefile	2017-06-28 07:29:58.000000000 -0400
+++ src/savi1.5.1/src/Makefile	2017-06-28 10:36:48.023603800 -0400
@@ -26,7 +26,7 @@ include Makefile_defs_$(ARCH)
 # zlib enables transparent gzip compression of dynamic texture scratchfiles.
 # OTHER_LIBS = -lz should be inserted at end of definitions file.
 
-   GCC_FLAGS = -O2 -DNO_ZLIB
+   GCC_FLAGS = -O2
 
         LIBS = $(TCL_LIBS) $(OTHER_LIBS) -lm