diff --git a/src/if_python3.c b/src/if_python3.c
index 1de8fe8d20..188e9c3e6d 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -45,6 +45,9 @@
 # undef F_BLANK
 #endif
 
+#ifdef HAVE_DUP
+# undef HAVE_DUP
+#endif
 #ifdef HAVE_STRFTIME
 # undef HAVE_STRFTIME
 #endif
diff --git a/src/version.c b/src/version.c
index a914e78af4..ca70914649 100644
--- a/src/version.c
+++ b/src/version.c
@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    831,
 /**/
     830,
 /**/