diff --git a/PyPDF2/filters.py b/PyPDF2/filters.py
index d0b566d13..077143813 100644
--- a/PyPDF2/filters.py
+++ b/PyPDF2/filters.py
@@ -73,10 +73,6 @@ def decompress(data: bytes) -> bytes:
         return result_str
 
 
-def compress(data: bytes) -> bytes:
-    return zlib.compress(data)
-
-
 class FlateDecode:
     @staticmethod
     def decode(
@@ -171,7 +167,7 @@ def _decode_png_prediction(data: str, columns: int) -> str:
 
     @staticmethod
     def encode(data: bytes) -> bytes:
-        return compress(data)
+        return zlib.compress(data)
 
 
 class ASCIIHexDecode: