diff --git a/src/squeaknim.nim b/src/squeaknim.nim
index 410e9e4..271a963 100644
--- a/src/squeaknim.nim
+++ b/src/squeaknim.nim
@@ -88,24 +88,33 @@ template writeExternalLibrary*() =
                  "!$1 class methodsFor: 'primitives' stamp: 'SqueakNim'!\C",
       gPrefix & capitalize(dllName), capitalize(dllName))
 
-template writeSmallTalkCode*(filename: string) =
-  ## You need to invoke this template to write the produced SmallTalk code to
+template writeSmalltalkCode*(filename: string) =
+  ## You need to invoke this template to write the produced Smalltalk code to
   ## a file.
   static:
     writeFile(filename, stCode)
 
-proc mapTypeToC(symbolicType: NimNode): string {.compileTime.} =
-  if symbolicType.kind == nnkEmpty: return "void"
+proc mapTypeToC(symbolicType: NimNode; isResultType: bool): string {.compileTime.} =
+  if symbolicType.kind == nnkEmpty and isResultType: return "void"
   let t = symbolicType.getType
   if symbolicType.kind == nnkSym and t.typeKind == ntyObject:
     return gPrefix & $symbolicType
   case t.typeKind
   of ntyPtr, ntyVar:
+    if t.typeKind == ntyVar and isResultType:
+      quit "cannot wrap 'var T' as a result type"
     expectKind t, nnkBracketExpr
-    result = mapTypeToC(t[1]) & "*"
+    let base = t[1]
+    if base.getType.typeKind == ntyArray:
+      expectKind base, nnkBracketExpr
+      result = mapTypeToC(base[2], isResultType) & "*"
+    else:
+      result = mapTypeToC(base, isResultType) & "*"
   of ntyArray:
+    if isResultType:
+      quit "cannot wrap array as a result type"
     expectKind t, nnkBracketExpr
-    result = mapTypeToC(t[2]) & "*"
+    result = mapTypeToC(t[2], isResultType) & "*"
   of ntyCString: result = "char*"
   of ntyPointer: result = "void*"
   of ntyInt: result = intType
@@ -145,7 +154,7 @@ macro exportSt*(body: stmt): stmt =
     else:
       st.add(": " & ident)
   # return type:
-  var apicall = "<cdecl: " & mapTypeToC(params[0]) & " '" &
+  var apicall = "<cdecl: " & mapTypeToC(params[0], true) & " '" &
                procName & "' ("
   var counter = 0
   # parameter types:
@@ -158,14 +167,14 @@ macro exportSt*(body: stmt): stmt =
       if counter > 0:
         apicall.add(" ")
         st.addf(" $1: $1", name)
-      apicall.add(mapTypeToC(typ))
+      apicall.add(mapTypeToC(typ, false))
       inc counter
   apicall.add(") module: '" & dllName & "'>\C" &
               "\t^self externalCallFailed\C!\C\C")
   stCode.add(st & "\C\t\"Generated by NimSqueak\"\C\t" & apicall)
 
-macro wrapObject*(typ: stmt): stmt =
-  ## Declares a SmallTalk wrapper class.
+macro wrapObject*(typ: stmt; wrapFields=false): stmt =
+  ## Declares a Smalltalk wrapper class.
   var t = typ.getType()
   if t.typeKind == ntyTypeDesc:
     expectKind t, nnkBracketExpr
@@ -177,9 +186,10 @@ macro wrapObject*(typ: stmt): stmt =
   t = t[1]
   expectKind t, nnkRecList
   var fields = ""
-  for i in 0.. < t.len:
-    expectKind t[i], nnkSym
-    fields.addf "\t\t($# '$#')\C", $t[i], mapTypeToC(t[i])
+  if $wrapFields == "true":
+    for i in 0.. < t.len:
+      expectKind t[i], nnkSym
+      fields.addf "\t\t($# '$#')\C", $t[i], mapTypeToC(t[i], false)
 
   let st = ("ExternalStructure subclass: #$1\C" &
     "\tinstanceVariableNames: ''\C" &
diff --git a/tests/Test1.nim b/tests/Test1.nim
index 71e7a71..76dcf7b 100644
--- a/tests/Test1.nim
+++ b/tests/Test1.nim
@@ -29,4 +29,4 @@ proc foo*(a, b: Vector3, c: int): cstring {.exportSt.} =
   result = "x plus y plus c " & $(a.x + b.y + c.float)
 
 # Write the Smalltalk code to file
-writeSmallTalkCode("Test1.st")
+writeSmalltalkCode("Test1.st")