diff --git a/compiler/ccgtypes.nim b/compiler/ccgtypes.nim
index 2fd8156154..f3f4a8b6e6 100644
--- a/compiler/ccgtypes.nim
+++ b/compiler/ccgtypes.nim
@@ -223,7 +223,8 @@ proc isInvalidReturnType(conf: ConfigRef; rettype: PType): bool =
   # such a poor programming language.
   # We exclude records with refs too. This enhances efficiency and
   # is necessary for proper code generation of assignments.
-  if rettype == nil: result = true
+  if rettype == nil or getSize(conf, rettype) > conf.target.floatSize*3:
+    result = true
   else:
     case mapType(conf, rettype, skResult)
     of ctArray: