diff --git a/src/core/modules/filters/filters_recipients.h b/src/core/modules/filters/filters_recipients.h
old mode 100644
new mode 100755
index 569cf1ed7..cc6d3a132
--- a/src/core/modules/filters/filters_recipients.h
+++ b/src/core/modules/filters/filters_recipients.h
@@ -114,7 +114,7 @@ class MRecipientFilter : public IRecipientFilter
 		object self = cls();
 		object add_recipient = self.attr("add_recipient");
 
-		IRecipientFilter *pFilter = (IRecipientFilter *)ExtractAddress(oPtr);
+		IRecipientFilter *pFilter = (IRecipientFilter *)ExtractAddress(oPtr, true);
 		for (int i=0; i < pFilter->GetRecipientCount(); i++) {
 			add_recipient(pFilter->GetRecipientIndex(i));
 		}
diff --git a/src/core/modules/memory/memory_utilities.h b/src/core/modules/memory/memory_utilities.h
index e7b43df22..7a644ef01 100755
--- a/src/core/modules/memory/memory_utilities.h
+++ b/src/core/modules/memory/memory_utilities.h
@@ -78,6 +78,9 @@ inline unsigned long ExtractAddress(object oPtr, bool bValidate = false)
 		pPtr = extractor();
 	}
 
+	if (!pPtr)
+		BOOST_RAISE_EXCEPTION(PyExc_ValueError, "None was passed, expected NULL or Pointer(0).")
+
 	if (bValidate)
 		pPtr->Validate();