diff --git a/pythonlsf/Makefile b/pythonlsf/Makefile
index b48b893..7df6577 100755
--- a/pythonlsf/Makefile
+++ b/pythonlsf/Makefile
@@ -14,7 +14,7 @@ PROJECT = _lsf.so
 OBJECTS = lsf_wrap.o
 
 CFLAGS  = -m64 -fPIC -I$(PYTHON_INCLUDE) -I$(LSF_INCLUDE)
-LDFLAGS = $(LSF_LIBDIR)/liblsf.a $(LSF_LIBDIR)/libbat.a $(LSF_LIBDIR)/libfairshareadjust.so $(LSF_LIBDIR)/liblsbstream.so -lc -lnsl
+LDFLAGS = $(LSF_LIBDIR)/liblsf.a $(LSF_LIBDIR)/libbat.a $(LSF_LIBDIR)/libfairshareadjust.so $(LSF_LIBDIR)/liblsbstream.so -lc -lnsl -lz
 
 all: $(PROJECT)
 
diff --git a/pythonlsf/lsf.i b/pythonlsf/lsf.i
index 25253a4..18771e6 100644
--- a/pythonlsf/lsf.i
+++ b/pythonlsf/lsf.i
@@ -27,6 +27,7 @@ int fclose(FILE *f);
 #include "lib.table.h"
 extern struct gpuJobData* str2GpuJobData(char *str);
 %}
+typedef long off_t;
 
 %pointer_functions(int, intp)
 %pointer_functions(float, floatp)
diff --git a/setup.py b/setup.py
index 57992b7..1476f9c 100755
--- a/setup.py
+++ b/setup.py
@@ -66,7 +66,7 @@ def set_gccflag_lsf_version():
         xlc_path = os.path.join(path, 'xlc')
         if os.access(xlc_path, os.F_OK):
             found_xlc = True
-            os.environ["LDSHARED"]  = "%s -pthread -shared -Wl,-z,relro" % xlc_path
+            os.environ["LDSHARED"]  = "%s -pthread -shared -Wl,-z,-lz,relro" % xlc_path
             break
     if found_xlc == False:
         print('''
@@ -90,11 +90,11 @@ def set_gccflag_lsf_version():
 
 if os.access(LSF_LIBDIR + "/liblsbstream.a", os.F_OK):
     lsf_static_lib = [ LSF_LIBDIR + '/liblsbstream.a']
-    lsf_dynamic_lib = ['c', 'nsl', 'rt']
+    lsf_dynamic_lib = ['c', 'nsl', 'rt', 'z']
     warning_msg = ""
 else:
     lsf_static_lib = []
-    lsf_dynamic_lib = ['c', 'nsl', 'lsbstream', 'lsf', 'bat', 'rt']
+    lsf_dynamic_lib = ['c', 'nsl', 'lsbstream', 'lsf', 'bat', 'rt', 'z']
     warning_msg = '''
 Warning: The compatibility of the LSF Python API package is not guaranteed 
          if you update LSF at a later time. This is because your current