Index: translator/GenPoly/Box.cc
===================================================================
--- translator/GenPoly/Box.cc	(revision 5c7fb6c8dfabfe6c6b4c365a4f378706430fd1bf)
+++ translator/GenPoly/Box.cc	(revision b8508a2e1ff21bb4fcf257c21b8086694f961c08)
@@ -1059,5 +1059,5 @@
 		    TypeInstType *typeInst = dynamic_cast< TypeInstType *>( objectDecl->get_type() );
 		    assert( typeInst );
-		    UntypedExpr *alloc = new UntypedExpr( new NameExpr( "alloca" ) );
+		    UntypedExpr *alloc = new UntypedExpr( new NameExpr( "__builtin_alloca" ) );
 		    alloc->get_args().push_back( new NameExpr( typeInst->get_name() ) );
 		    UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );