1 files changed, 5 insertions, 1 deletions
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 3fa2d6a..0a84118 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -883,6 +883,7 @@ PySSL_peercert(PySSLSocket *self, PyObject *args)
     int len;
     int verification;
     PyObject *binary_mode = Py_None;
+    int b;
 
     if (!PyArg_ParseTuple(args, "|O:peer_certificate", &binary_mode))
         return NULL;
@@ -890,7 +891,10 @@ PySSL_peercert(PySSLSocket *self, PyObject *args)
     if (!self->peer_cert)
         Py_RETURN_NONE;
 
-    if (PyObject_IsTrue(binary_mode)) {
+    b = PyObject_IsTrue(binary_mode);
+    if (b < 0)
+        return NULL;
+    if (b) {
         /* return cert in DER-encoded format */
 
         unsigned char *bytes_buf = NULL;