diff --git "a/.\\Python-3.5.0b4/Lib/test/test_float.py" "b/.\\Python-3.5.0b4/Lib/test/test_float.py"
index 4251090..14a3bc5 100644
--- "a/.\\Python-3.5.0b4/Lib/test/test_float.py"	
+++ "b/.\\Python-3.5.0b4/Lib/test/test_float.py"
@@ -8,6 +8,7 @@ import sys
 import struct
 import time
 import unittest
+import array
 
 from test import support
 from math import isinf, isnan, copysign, ldexp
@@ -32,6 +33,8 @@ class GeneralFloatCases(unittest.TestCase):
         self.assertEqual(float(314), 314.0)
         self.assertEqual(float("  3.14  "), 3.14)
         self.assertEqual(float(b" 3.14  "), 3.14)
+        self.assertEqual(float(bytearray(b" 3.14  ")), 3.14)
+        self.assertEqual(float(array.array("B", b" 3.14  ")), 3.14)
         self.assertRaises(ValueError, float, "  0x3.1  ")
         self.assertRaises(ValueError, float, "  -0x3.p-1  ")
         self.assertRaises(ValueError, float, "  +0x3.p-1  ")
@@ -44,6 +47,8 @@ class GeneralFloatCases(unittest.TestCase):
         self.assertRaises(ValueError, float, ".")
         self.assertRaises(ValueError, float, "-.")
         self.assertRaises(ValueError, float, b"-")
+        self.assertRaises(ValueError, float, bytearray(b"A" * 0x10))
+        self.assertRaises(ValueError, float, array.array("B", b"A" * 0x10))
         self.assertRaises(TypeError, float, {})
         self.assertRaisesRegex(TypeError, "not 'dict'", float, {})
         # Lone surrogate
diff --git "a/.\\Python-3.5.0b4/Objects/floatobject.c" "b/.\\Python-3.5.0b4/Objects/floatobject.c"
index d681981..b288f85 100644
--- "a/.\\Python-3.5.0b4/Objects/floatobject.c"	
+++ "b/.\\Python-3.5.0b4/Objects/floatobject.c"
@@ -145,7 +145,17 @@ PyFloat_FromString(PyObject *v)
         }
     }
     else if (PyObject_GetBuffer(v, &view, PyBUF_SIMPLE) == 0) {
-        s = (const char *)view.buf;
+        if (PyBytes_Check(v) || PyByteArray_Check(v))
+            s = (const char *)view.buf;
+        else {
+            s_buffer = PyBytes_FromStringAndSize((const char *)view.buf, 
+                                                 view.len);
+            if (s_buffer == NULL) {
+                PyBuffer_Release(&view);
+                return NULL;
+            }
+            s = PyBytes_AsString(s_buffer);
+        }
         len = view.len;
     }
     else {