diff --git a/content.c b/content.c
index 784b173a9a..d8e1fa629f 100644
--- a/content.c
+++ b/content.c
@@ -98,7 +98,7 @@ static bool read_content_file(unsigned i, const char *path, void **buf,
 #ifdef HAVE_ZLIB
    content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
 
-   *content_crc_ptr = zlib_crc32_calculate(ret_buf, *length);
+   *content_crc_ptr = zlib_crc32_calculate(0, ret_buf, *length);
 
    RARCH_LOG("CRC32: 0x%x .\n", (unsigned)*content_crc_ptr);
 #endif
diff --git a/file_ops.c b/file_ops.c
index 2d10b38f8a..1694307f01 100644
--- a/file_ops.c
+++ b/file_ops.c
@@ -400,7 +400,7 @@ static int zip_file_decompressed(const char *name, const char *valid_exts,
             ret = zlib_inflate_data_to_file_iterate(handle.stream);
          }while(ret == 0);
 
-         handle.real_checksum = zlib_crc32_calculate(handle.data, size);
+         handle.real_checksum = zlib_crc32_calculate(0, handle.data, size);
 
          if (handle.real_checksum != crc32)
          {
diff --git a/libretro-common/file/file_extract.c b/libretro-common/file/file_extract.c
index 0d12556534..727f31635d 100644
--- a/libretro-common/file/file_extract.c
+++ b/libretro-common/file/file_extract.c
@@ -203,9 +203,9 @@ int zlib_inflate_data_to_file_iterate(void *data)
    return 0;
 }
 
-uint32_t zlib_crc32_calculate(const uint8_t *data, size_t length)
+uint32_t zlib_crc32_calculate(uint32_t crc, const uint8_t *data, size_t length)
 {
-   return crc32(0, data, length);
+   return crc32(crc, data, length);
 }
 
 uint32_t zlib_crc32_adjust(uint32_t crc, uint8_t data)
@@ -245,7 +245,7 @@ int zlib_inflate_data_to_file(zlib_file_handle_t *handle,
       goto end;
    }
 
-   handle->real_checksum = zlib_crc32_calculate(handle->data, size);
+   handle->real_checksum = zlib_crc32_calculate(0, handle->data, size);
 
 #if 0
    if (handle->real_checksum != checksum)
diff --git a/libretro-common/formats/png/rpng_encode.c b/libretro-common/formats/png/rpng_encode.c
index b276ff47c5..d95ee3d570 100644
--- a/libretro-common/formats/png/rpng_encode.c
+++ b/libretro-common/formats/png/rpng_encode.c
@@ -48,7 +48,7 @@ static void dword_write_be(uint8_t *buf, uint32_t val)
 static bool png_write_crc(RFILE *file, const uint8_t *data, size_t size)
 {
    uint8_t crc_raw[4] = {0};
-   uint32_t crc = zlib_crc32_calculate(data, size);
+   uint32_t crc = zlib_crc32_calculate(0, data, size);
 
    dword_write_be(crc_raw, crc);
    return retro_fwrite(file, crc_raw, sizeof(crc_raw)) == sizeof(crc_raw);
diff --git a/libretro-common/include/file/file_extract.h b/libretro-common/include/file/file_extract.h
index 18c2b28003..b705eb9f2e 100644
--- a/libretro-common/include/file/file_extract.h
+++ b/libretro-common/include/file/file_extract.h
@@ -73,7 +73,7 @@ typedef int (*zlib_file_cb)(const char *name, const char *valid_exts,
       const uint8_t *cdata, unsigned cmode, uint32_t csize, uint32_t size,
       uint32_t crc32, void *userdata);
 
-uint32_t zlib_crc32_calculate(const uint8_t *data, size_t length);
+uint32_t zlib_crc32_calculate(uint32_t crc, const uint8_t *data, size_t length);
 
 uint32_t zlib_crc32_adjust(uint32_t crc, uint8_t data);
 
diff --git a/patch.c b/patch.c
index ef4e9edf5c..4844904ae8 100644
--- a/patch.c
+++ b/patch.c
@@ -186,7 +186,7 @@ patch_error_t bps_apply_patch(
       modify_modify_checksum |= bps_read(&bps) << i;
 
 #ifdef HAVE_ZLIB
-   bps.source_checksum = zlib_crc32_calculate(bps.source_data, bps.source_length);
+   bps.source_checksum = zlib_crc32_calculate(0, bps.source_data, bps.source_length);
 #else
    return PATCH_PATCH_CHECKSUM_INVALID;
 #endif
diff --git a/tasks/task_database.c b/tasks/task_database.c
index b964bf2455..75976dd185 100644
--- a/tasks/task_database.c
+++ b/tasks/task_database.c
@@ -208,7 +208,7 @@ static int database_info_iterate_playlist(
 
 
 #ifdef HAVE_ZLIB
-            db_state->crc = zlib_crc32_calculate(db_state->buf, ret);
+            db_state->crc = zlib_crc32_calculate(0, db_state->buf, ret);
 #endif
             db->type = DATABASE_TYPE_CRC_LOOKUP;
          }