diff --git a/_inventory.html b/_inventory.html
index 326070c..d48a72f 100644
--- a/_inventory.html
+++ b/_inventory.html
@@ -84,7 +84,10 @@
 
 <script type="text/javascript" src="scripts.js"></script>
 <script type="text/javascript">
-	(function () {
-		disableColumSort(document.querySelector("table[class=list]"));
-	})();
+(function () {
+	let table = document.querySelector("table[class=list]");
+	if (table != null) {
+		disableColumSort(table);
+	}
+})();
 </script>
diff --git a/equipment_history.html b/equipment_history.html
index 48d5039..9685b1b 100644
--- a/equipment_history.html
+++ b/equipment_history.html
@@ -315,7 +315,10 @@
 
 <script type="text/javascript" src="scripts.js"></script>
 <script type="text/javascript">
-	(function () {
-		disableColumSort(document.querySelector("table[class=list]"));
-	})();
+(function () {
+	let table = document.querySelector("table[class=list]");
+	if (table != null) {
+		disableColumSort(table);
+	}
+})();
 </script>
diff --git a/global_history.html b/global_history.html
index 726075e..8f98f16 100644
--- a/global_history.html
+++ b/global_history.html
@@ -88,7 +88,10 @@
 
 <script type="text/javascript" src="scripts.js"></script>
 <script type="text/javascript">
-	(function () {
-		disableColumSort(document.querySelector("table[class=list]"));
-	})();
+(function () {
+	let table = document.querySelector("table[class=list]");
+	if (table != null) {
+		disableColumSort(table);
+	}
+})();
 </script>