diff --git a/go/gogo.cc b/go/gogo.cc
index bea2e29..82d15c3 100644
--- a/go/gogo.cc
+++ b/go/gogo.cc
@@ -4484,9 +4484,7 @@
 Gogo::allocate_memory(Type* type, Location location)
 {
   Expression* td = Expression::make_type_descriptor(type, location);
-  Expression* size =
-    Expression::make_type_info(type, Expression::TYPE_INFO_SIZE);
-  return Runtime::make_call(Runtime::NEW, location, 2, td, size);
+  return Runtime::make_call(Runtime::NEW, location, 1, td);
 }
 
 // Traversal class used to check for return statements.
diff --git a/go/runtime.def b/go/runtime.def
index 512f638..a2f2e3a 100644
--- a/go/runtime.def
+++ b/go/runtime.def
@@ -224,7 +224,7 @@
 
 
 // Allocate memory.
-DEF_GO_RUNTIME(NEW, "__go_new", P2(TYPE, UINTPTR), R1(POINTER))
+DEF_GO_RUNTIME(NEW, "__go_new", P1(TYPE), R1(POINTER))
 
 // Start a new goroutine.
 DEF_GO_RUNTIME(GO, "__go_go", P2(FUNC_PTR, POINTER), R0())
diff --git a/libgo/runtime/go-new.c b/libgo/runtime/go-new.c
index da44074..bc5c567 100644
--- a/libgo/runtime/go-new.c
+++ b/libgo/runtime/go-new.c
@@ -10,9 +10,9 @@
 #include "go-type.h"
 
 void *
-__go_new (const struct __go_type_descriptor *td, uintptr_t size)
+__go_new (const struct __go_type_descriptor *td)
 {
-  return runtime_mallocgc (size,
+  return runtime_mallocgc (td->__size,
 			   (uintptr) td | TypeInfo_SingleObject,
 			   td->__code & GO_NO_POINTERS ? FlagNoScan : 0);
 }