diff --git a/src/if_python3.c b/src/if_python3.c
index 75d2122..a41d6ac 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -232,6 +232,8 @@
 # endif
 # undef PyBytes_FromString
 # define PyBytes_FromString py3_PyBytes_FromString
+# undef PyBytes_FromStringAndSize
+# define PyBytes_FromStringAndSize py3_PyBytes_FromStringAndSize
 # define PyFloat_FromDouble py3_PyFloat_FromDouble
 # define PyFloat_AsDouble py3_PyFloat_AsDouble
 # define PyObject_GenericGetAttr py3_PyObject_GenericGetAttr
@@ -394,6 +396,7 @@
 static char* (*py3_PyBytes_AsString)(PyObject *bytes);
 static int (*py3_PyBytes_AsStringAndSize)(PyObject *bytes, char **buffer, Py_ssize_t *length);
 static PyObject* (*py3_PyBytes_FromString)(char *str);
+static PyObject* (*py3_PyBytes_FromStringAndSize)(char *str, Py_ssize_t length);
 static PyObject* (*py3_PyFloat_FromDouble)(double num);
 static double (*py3_PyFloat_AsDouble)(PyObject *);
 static PyObject* (*py3_PyObject_GenericGetAttr)(PyObject *obj, PyObject *name);
@@ -559,6 +562,7 @@
     {"PyBytes_AsString", (PYTHON_PROC*)&py3_PyBytes_AsString},
     {"PyBytes_AsStringAndSize", (PYTHON_PROC*)&py3_PyBytes_AsStringAndSize},
     {"PyBytes_FromString", (PYTHON_PROC*)&py3_PyBytes_FromString},
+    {"PyBytes_FromStringAndSize", (PYTHON_PROC*)&py3_PyBytes_FromStringAndSize},
     {"PyFloat_FromDouble", (PYTHON_PROC*)&py3_PyFloat_FromDouble},
     {"PyFloat_AsDouble", (PYTHON_PROC*)&py3_PyFloat_AsDouble},
     {"PyObject_GenericGetAttr", (PYTHON_PROC*)&py3_PyObject_GenericGetAttr},
@@ -1680,6 +1684,7 @@
 	case VAR_SPECIAL:
 	case VAR_JOB:
 	case VAR_CHANNEL:
+	case VAR_BLOB:
 	    break;
     }
 }