diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/ItemType.java b/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/ItemType.java
index 692b8a6233..c372f584ea 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/ItemType.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/ItemType.java
@@ -66,7 +66,7 @@ public enum ItemType
 		{
 			return ItemType.AMMO;
 		}
-		if (item.getName().contains("rune"))
+		if (item.getName().toLowerCase().contains("rune"))
 		{
 			return ItemType.RUNE;
 		}
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/SuppliesTrackerPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/SuppliesTrackerPlugin.java
index 3fc78a6532..af1a6685a9 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/SuppliesTrackerPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/suppliestracker/SuppliesTrackerPlugin.java
@@ -401,7 +401,13 @@ public class SuppliesTrackerPlugin extends Plugin
 					{
 						quantity -= newItem.getQuantity();
 					}
-					buildEntries(oldItem.getId(), quantity);
+					// ensure that only positive quantities are added since it is reported
+					// that sometimes checkUsedRunes is called on the same tick that a player
+					// gains runes in their inventory
+					if (quantity > 0)
+					{
+						buildEntries(oldItem.getId(), quantity);
+					}
 				}
 			}
 		}