error when make file

[DooYal]

[root@localhost bamcov]# make
cd htslib && make libhts.a
make[1]: Entering directory '/root/bamcov/htslib'
gcc -g -Wall -O2 -I. -c -o bgzf.o bgzf.c
In file included from bgzf.c:43:
htslib/bgzf.h:35:10: fatal error: zlib.h: No such file or directory
#include <zlib.h>
^~~~~~~~
compilation terminated.
make[1]: *** [Makefile:130: bgzf.o] Error 1
make[1]: Leaving directory '/root/bamcov/htslib'
make: *** [Makefile:44: htslib/libhts.a] Error 2