diff --git a/src/js/economyJS.js b/src/js/economyJS.js
index 3daa3d8614194a18e435069eacbe4fc8a695b078..e74605496609577346f2654fc930ee68c5686f47 100644
--- a/src/js/economyJS.js
+++ b/src/js/economyJS.js
@@ -999,7 +999,7 @@ window.getSlaveCostArray = function(s) {
 
 /**
  * @param {App.Entity.SlaveState} s
- * @returns {Number}
+ * @returns {number}
  */
 window.getSlaveCost = function(s) {
 	return getSlaveCostArray(s).reduce((result, {value})=>result + value, 0);
@@ -1008,8 +1008,8 @@ window.getSlaveCost = function(s) {
 /**
  * Supply and Demand for slaves (linear, simple)
  * PC buying slaves reduces supply, selling slaves reduces demand.
- * @param {Number} q
- * @returns {Number}
+ * @param {number} q
+ * @returns {number}
  */
 window.menialSlaveCost = function(q = 0) {
 	const demand = State.variables.menialDemandFactor;
diff --git a/src/js/slaveCostJS.js b/src/js/slaveCostJS.js
index 75aa237091bbc8d18b558e4272b18d7ed8370aac..f62e0a87d18aa06f46b051928cd9728b10648739 100644
--- a/src/js/slaveCostJS.js
+++ b/src/js/slaveCostJS.js
@@ -2067,7 +2067,7 @@ window.FResultArray = (function() {
 
 	/**
 	 * @param {string} text blurb
-	 * @param {Number} FResultChange
+	 * @param {number} FResultChange
 	 */
 	function adjustFResult(text, FResultChange) {
 		retval.push({text: text, value: FResultChange});