diff --git a/blender_asset_tracer/blendfile/__init__.py b/blender_asset_tracer/blendfile/__init__.py
index 00456c8..222a263 100644
--- a/blender_asset_tracer/blendfile/__init__.py
+++ b/blender_asset_tracer/blendfile/__init__.py
@@ -72,12 +72,13 @@ class BlendFile:
             self.is_compressed = False
             self.raw_filepath = path
             self.fileobj = fileobj
-        elif magic == GZIP_MAGIC:
+        elif magic[:2] == GZIP_MAGIC:
             self.is_compressed = True
 
             log.debug("compressed blendfile detected: %s", path)
             # Decompress to a temporary file.
             tmpfile = tempfile.NamedTemporaryFile()
+            fileobj.seek(0, os.SEEK_SET)
             with gzip.GzipFile(fileobj=fileobj, mode=mode) as gzfile:
                 magic = gzfile.read(len(BLENDFILE_MAGIC))
                 if magic != BLENDFILE_MAGIC:
diff --git a/tests/blendfiles/basic_file_compressed.blend b/tests/blendfiles/basic_file_compressed.blend
new file mode 100644
index 0000000..d2fa563
Binary files /dev/null and b/tests/blendfiles/basic_file_compressed.blend differ
diff --git a/tests/test_blendfile_loading.py b/tests/test_blendfile_loading.py
index 2206d99..5fc4f8a 100644
--- a/tests/test_blendfile_loading.py
+++ b/tests/test_blendfile_loading.py
@@ -196,3 +196,13 @@ class PointerTest(AbstractBlendFileTest):
         seq.refine_type_from_index(sdna_idx_sequence)
         self.assertEqual(b'SQBlack', seq[b'name'])
         self.assertEqual(28, seq[b'type'])
+
+
+class LoadCompressedTest(AbstractBlendFileTest):
+    def test_loading(self):
+        self.bf = blendfile.BlendFile(self.blendfiles / 'basic_file_compressed.blend')
+        self.assertTrue(self.bf.is_compressed)
+
+        ob = self.bf.code_index[b'OB'][0]
+        name = ob.get((b'id', b'name'))
+        self.assertEqual('OBümlaut', name)