diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 32e7cc8..83401f2 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -246,6 +246,9 @@
 		if (PyOS_strnicmp(p, "inf", 4) == 0) {
 			Py_RETURN_INF(sign);
 		}
+		if (PyOS_strnicmp(p, "infinity", 9) == 0) {
+			Py_RETURN_INF(sign);
+		}
 #ifdef Py_NAN
 		if(PyOS_strnicmp(p, "nan", 4) == 0) {
 			Py_RETURN_NAN;