diff --git a/CHANGELOG.md b/CHANGELOG.md
index ccc7bac..53a927d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@ All notable changes to this project will be documented in this file. This change
 
 ## [Unreleased]
 
+## [0.1.184] - 2021-09-30
+### Fixed
+- Deserializing nullpointers as functions threw an exception
+- Upcall stubs with non-primitive arguments failed to compile
+- Upcall stubs had incorrect types
+
 ## [0.1.176] - 2021-09-29
 ### Fixed
 - Usage of `defcfn` without a docstring produced an invalid `def` form
@@ -17,6 +23,7 @@ All notable changes to this project will be documented in this file. This change
 - Support for serializing and deserializing arbitrary Clojure functions
 - Support for serializing and deserializing arbitrary Clojure data structures
 
-[Unreleased]: https://github.com/IGJoshua/coffi/compare/v0.1.176...HEAD
+[Unreleased]: https://github.com/IGJoshua/coffi/compare/v0.1.184...HEAD
+[0.1.184]: https://github.com/IGJoshua/coffi/compare/v0.1.176...v0.1.184
 [0.1.176]: https://github.com/IGJoshua/coffi/compare/v0.1.169...v0.1.176
 [0.1.169]: https://github.com/IGJoshua/coffi/compare/16f56bc31d69142ec4d2fb61b15b069d78b127ca...v0.1.169
diff --git a/README.md b/README.md
index a900d1b..5bcbb00 100644
--- a/README.md
+++ b/README.md
@@ -17,8 +17,8 @@ This library is available on Clojars. Add one of the following entries to the
 `:deps` key of your `deps.edn`:
 
 ```clojure
-org.suskalo/coffi {:mvn/version "0.1.176"}
-io.github.IGJoshua/coffi {:git/tag "v0.1.176" :git/sha "2a90bdb"}
+org.suskalo/coffi {:mvn/version "0.1.184"}
+io.github.IGJoshua/coffi {:git/tag "v0.1.184" :git/sha "ea53cfb"}
 ```
 
 If you use this library as a git dependency, you will need to prepare the
diff --git a/src/clj/coffi/ffi.clj b/src/clj/coffi/ffi.clj
index 4c966e6..c6558a0 100644
--- a/src/clj/coffi/ffi.clj
+++ b/src/clj/coffi/ffi.clj
@@ -314,13 +314,13 @@
                      [:return]]}
              {:name :upcall
               :flags #{:public}
-              :desc (conj (mapv mem/java-layout arg-types)
-                          (mem/java-layout ret-type))
+              :desc (conj (mapv insn-layout arg-types)
+                          (insn-layout ret-type))
               :emit [[:aload 0]
                      [:getfield :this "upcall_ifn" IFn]
                      (map-indexed
                       (fn [idx arg]
-                        [[(load-instructions arg) (inc idx)]
+                        [[(load-instructions arg :aload) (inc idx)]
                          (to-object-asm arg)])
                       arg-types)
                      [:invokeinterface IFn "invoke" (repeat (inc (count arg-types)) Object)]
@@ -367,13 +367,14 @@
 
 (defmethod mem/deserialize* ::fn
   [addr [_fn arg-types ret-type & {:keys [raw-fn?]}]]
-  (-> addr
-      (downcall-handle
-       (method-type arg-types ret-type)
-       (function-descriptor arg-types ret-type))
-      (downcall-fn arg-types ret-type)
-      (cond->
-        (not raw-fn?) (make-serde-wrapper arg-types ret-type))))
+  (when-not (mem/null? addr)
+    (-> addr
+        (downcall-handle
+         (method-type arg-types ret-type)
+         (function-descriptor arg-types ret-type))
+        (downcall-fn arg-types ret-type)
+        (cond->
+            (not raw-fn?) (make-serde-wrapper arg-types ret-type)))))
 
 ;;; Static memory access