diff --git a/c-ext/decompressobj.c b/c-ext/decompressobj.c
index f643c952..d4138ca0 100644
--- a/c-ext/decompressobj.c
+++ b/c-ext/decompressobj.c
@@ -21,8 +21,7 @@ static void DecompressionObj_dealloc(ZstdDecompressionObj* self) {
 }
 
 static PyObject* DecompressionObj_decompress(ZstdDecompressionObj* self, PyObject* args) {
-	const char* source;
-	Py_ssize_t sourceSize;
+	Py_buffer source;
 	size_t zresult;
 	ZSTD_inBuffer input;
 	ZSTD_outBuffer output;
@@ -39,16 +38,15 @@ static PyObject* DecompressionObj_decompress(ZstdDecompressionObj* self, PyObjec
 	}
 
 #if PY_MAJOR_VERSION >= 3
-	if (!PyArg_ParseTuple(args, "y#:decompress",
+	if (!PyArg_ParseTuple(args, "y*:decompress", &source)) {
 #else
-	if (!PyArg_ParseTuple(args, "s#:decompress",
+	if (!PyArg_ParseTuple(args, "s*:decompress", &source)) {
 #endif
-		&source, &sourceSize)) {
 		return NULL;
 	}
 
-	input.src = source;
-	input.size = sourceSize;
+	input.src = source.buf;
+	input.size = source.len;
 	input.pos = 0;
 
 	output.dst = PyMem_Malloc(outSize);
@@ -107,6 +105,7 @@ static PyObject* DecompressionObj_decompress(ZstdDecompressionObj* self, PyObjec
 
 finally:
 	PyMem_Free(output.dst);
+	PyBuffer_Release(&source);
 
 	return result;
 }
diff --git a/tests/test_decompressor.py b/tests/test_decompressor.py
index 80bf7d85..93f74f93 100644
--- a/tests/test_decompressor.py
+++ b/tests/test_decompressor.py
@@ -360,6 +360,20 @@ def test_simple(self):
         dobj = dctx.decompressobj()
         self.assertEqual(dobj.decompress(data), b'foobar')
 
+    def test_input_types(self):
+        compressed = zstd.ZstdCompressor(level=1).compress(b'foo')
+
+        dctx = zstd.ZstdDecompressor()
+
+        sources = [
+            memoryview(compressed),
+            bytearray(compressed),
+        ]
+
+        for source in sources:
+            dobj = dctx.decompressobj()
+            self.assertEqual(dobj.decompress(source), b'foo')
+
     def test_reuse(self):
         data = zstd.ZstdCompressor(level=1).compress(b'foobar')