diff --git a/core/zlib/zlib-1.2.5-lfs-decls.patch b/core/zlib/zlib-1.2.5-lfs-decls.patch
new file mode 100644
index 000000000..36e26af03
--- /dev/null
+++ b/core/zlib/zlib-1.2.5-lfs-decls.patch
@@ -0,0 +1,13 @@
+Index: zlib-1.2.5/zlib.h
+===================================================================
+--- zlib-1.2.5.orig/zlib.h
++++ zlib-1.2.5/zlib.h
+@@ -1578,7 +1578,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF(
+ #  define gzoffset gzoffset64
+ #  define adler32_combine adler32_combine64
+ #  define crc32_combine crc32_combine64
+-#  ifdef _LARGEFILE64_SOURCE
++#  ifndef _LARGEFILE64_SOURCE
+      ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
+      ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int));
+      ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));