diff --git a/src/js/sexActsJS.js b/src/js/sexActsJS.js
index f2d4dc643be632d563b70e60d53b360771636a32..3375204a38707d61a7f4185c72c92188403ca894 100644
--- a/src/js/sexActsJS.js
+++ b/src/js/sexActsJS.js
@@ -485,6 +485,9 @@ window.actX = function actX(slave, act, count = 1) {
 		case "vaginal":
 			V.vaginalTotal += count;
 			break;
+		default:
+			// Act was likely entered incorrectly.
+			return;
 	}
 	if (act === "birth") { // Annoyingly at the moment, V.birthsTotal means all the births in your arc.  Within the slave counter though, .birth is all births in your arc and .birthTotal includes births outside your arch.
 		slave.counter.birthToal += count;