diff --git a/apbs-python311.patch b/apbs-python311.patch
new file mode 100644
index 0000000..adf7420
--- /dev/null
+++ b/apbs-python311.patch
@@ -0,0 +1,11 @@
+--- a/tools/manip/inputgen.orig.py	2020-05-30 03:47:30.000000000 +0200
++++ b/tools/manip/inputgen.py	2021-12-26 12:13:08.819979543 +0100
+@@ -266,7 +266,7 @@
+                        file (string)
+     """
+     nproc = 0
+-    file = open(filename, 'rU')
++    file = open(filename)
+     text = ""
+     while 1:
+         line = file.readline()