diff --git a/Source/NSInvocation.m b/Source/NSInvocation.m
index fb03d7f6e..41bc4bd5f 100644
--- a/Source/NSInvocation.m
+++ b/Source/NSInvocation.m
@@ -452,7 +452,7 @@
         if (*t == _C_STRUCT_B || *t == _C_UNION_B || *t == _C_ARY_B)
           {
 	    *(void**)datum = _fastMallocBuffer(info[i].size);
-            data = *(void**)datum;
+            datum = *(void**)datum;
           }
       }
 #endif