diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 7ebb814..114f84c 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -29,3 +29,4 @@ Arvid Norlander
 David Cox
 Maximilian Peltzer
 Adi Harif
+Oisín Mac Fhearaí
diff --git a/pyswip/core.py b/pyswip/core.py
index 4c0fbae..3f867b7 100644
--- a/pyswip/core.py
+++ b/pyswip/core.py
@@ -594,7 +594,7 @@ def check_and_call(*args):
 # https://github.com/SWI-Prolog/swipl-devel/issues/900
 # https://github.com/SWI-Prolog/swipl-devel/issues/910
 try:
-    if _lib.PL_version_info != None:
+    if hasattr(_lib, "PL_version_info"):
         PL_version = _lib.PL_version_info # swi-prolog > 8.5.2
     else:
         PL_version = _lib.PL_version # swi-prolog <= 8.5.2