diff --git a/elftools/elf/elffile.py b/elftools/elf/elffile.py
index 5c5d47ec..c7154439 100644
--- a/elftools/elf/elffile.py
+++ b/elftools/elf/elffile.py
@@ -12,18 +12,6 @@
 import struct
 import zlib
 
-try:
-    import resource
-    PAGESIZE = resource.getpagesize()
-except ImportError:
-    try:
-        # Windows system
-        import mmap
-        PAGESIZE = mmap.PAGESIZE
-    except ImportError:
-        # Jython
-        PAGESIZE = 4096
-
 from ..common.exceptions import ELFError, ELFParseError
 from ..common.utils import struct_parse, elf_assert
 from .structs import ELFStructs
@@ -857,7 +845,7 @@ def _decompress_dwarf_section(section):
         decompressor = zlib.decompressobj()
         uncompressed_stream = BytesIO()
         while True:
-            chunk = section.stream.read(PAGESIZE)
+            chunk = section.stream.read(4096)
             if not chunk:
                 break
             uncompressed_stream.write(decompressor.decompress(chunk))