diff --git a/src/main/java/org/cobbzilla/util/cache/CacheLookupException.java b/src/main/java/org/cobbzilla/util/cache/CacheLookupException.java
new file mode 100644
index 0000000..3c35ad9
--- /dev/null
+++ b/src/main/java/org/cobbzilla/util/cache/CacheLookupException.java
@@ -0,0 +1,7 @@
+package org.cobbzilla.util.cache;
+
+public class CacheLookupException extends RuntimeException {
+
+    public CacheLookupException(String message) { super(message); }
+
+}