diff --git a/VERSION b/VERSION
index 8dc52b69..3e80806b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.580
+8.3.581
diff --git a/cif/CIFgen.c b/cif/CIFgen.c
index 7035ca03..807a4816 100644
--- a/cif/CIFgen.c
+++ b/cif/CIFgen.c
@@ -4747,9 +4747,6 @@ cifInteractingRegions(
 	    /* Get tile area for interaction search */
 	    TiToRect(t, &rect);
 
-	    /* Ignore tiles outside of the search area */
-	    if (!GEO_SURROUND(area, &rect)) continue;
-
 	    /* "interacting" includes touching as well as overlapping, so expand
 	     * search by one unit in every direction and then check overlap.
 	     * NOTE:  This catches catecorner-touching material, which is