diff --git a/Makefile.std b/Makefile.std
index 95b0940..630188a 100644
--- a/Makefile.std
+++ b/Makefile.std
@@ -22,7 +22,7 @@ endif
 CFLAGS=-Wall -O2
 BLASFLAGS=-L/usr/lib64/atlas -llapack -lcblas -latlas
 LINKFLAGS=-lm -lpthread
-ZLIB=zlib-1.2.8/libz.so.1.2.8
+ZLIB=-lz 
 
 ifeq ($(SYS), MAC)
   GCC_GTEQ_43 := $(shell expr `g++ -dumpversion | sed -e 's/\.\([0-9][0-9]\)/\1/g' -e 's/\.\([0-9]\)/0\1/g' -e 's/^[0-9]\{3,4\}$$/&00/'` \>= 40300)