diff --git a/collections/clojure/lang/PersistentUnrolledMap.java b/collections/clojure/lang/PersistentUnrolledMap.java
index 24273df..506a82c 100644
--- a/collections/clojure/lang/PersistentUnrolledMap.java
+++ b/collections/clojure/lang/PersistentUnrolledMap.java
@@ -195,27 +195,27 @@ private int indexOf(int h, Object key) {
 		switch (6 - count) {
 		case 0:
 		    if (k5 == key) {
-			return 6;
+			return 5;
 		    }
 		case 1:
 		    if (k4 == key) {
-			return 5;
+			return 4;
 		    }
 		case 2:
 		    if (k3 == key) {
-			return 4;
+			return 3;
 		    }
 		case 3:
 		    if (k2 == key) {
-			return 3;
+			return 2;
 		    }
 		case 4:
 		    if (k1 == key) {
-			return 2;
+			return 1;
 		    }
 		case 5:
 		    if (k0 == key) {
-			return 1;
+			return 0;
 		    }
 		default:
 		    return -1;
diff --git a/generate/cambrian_collections/map.clj b/generate/cambrian_collections/map.clj
index c8e9b40..031fab6 100644
--- a/generate/cambrian_collections/map.clj
+++ b/generate/cambrian_collections/map.clj
@@ -556,7 +556,7 @@
                 (fn [idx k]
                   [idx
                    (j/cond (str k "== key")
-                     (j/return (- max-cardinality idx)))])
+                     (j/return (- max-cardinality idx 1)))])
                 (range)
                 (reverse ks))
               [(j/return -1)])))
diff --git a/project.clj b/project.clj
index 1624374..8af5808 100644
--- a/project.clj
+++ b/project.clj
@@ -13,7 +13,7 @@
    [org.jibx.config.3rdparty.org.eclipse/org.eclipse.text "3.5.100.v20110505-0800"]
    [org.jibx.config.3rdparty.org.eclipse/org.eclipse.core.resources "3.7.100.v20110510-0712"]
    [org.jibx.config.3rdparty.org.eclipse/org.eclipse.equinox.common "3.6.0.v20110523"]]
-  :jvm-opts ["-server"]
+  :jvm-opts ["-server" "-Xmx2g"]
   :test-selectors {:default (complement :benchmark)
                    :benchmark :benchmark}
   :main cambrian-collections.main
diff --git a/test/cambrian_collections/map_test.clj b/test/cambrian_collections/map_test.clj
index b10bb0b..b8d0881 100644
--- a/test/cambrian_collections/map_test.clj
+++ b/test/cambrian_collections/map_test.clj
@@ -15,7 +15,15 @@
 (declare unrolled)
 
 (deftest test-map-like
-  (check/assert-map-like 1e4 (unrolled) gen/int gen/int))
+  (check/assert-map-like 1e4 (unrolled) gen/int gen/int)
+  #_(check/assert-map-like 1e3 (unrolled) gen/any gen/int)
+  (check/assert-map-like 1e3 (unrolled)
+    (gen/one-of (->> (range (int \a) (int \z))
+                  (map char)
+                  (map str)
+                  (map keyword)
+                  (map gen/return)))
+    gen/int))
 
 #_(deftest test-print-dup
   (binding [*print-dup* true]