diff --git a/dmd/expression.c b/dmd/expression.c
index 469f5be2..fa9eb749 100644
--- a/dmd/expression.c
+++ b/dmd/expression.c
@@ -3617,8 +3617,8 @@ Lagain:
 
 	if (cd->aggNew)
 	{
-	    // Prepend the uint size argument to newargs[]
-	    Expression *e = new IntegerExp(loc, cd->size(loc), Type::tuns32);
+	    // Prepend the size_t size argument to newargs[]
+	    Expression *e = new IntegerExp(loc, cd->size(loc), Type::tsize_t);
 	    if (!newargs)
 		newargs = new Expressions();
 	    newargs->shift(e);
diff --git a/dmd/func.c b/dmd/func.c
index cc13384b..9414d978 100644
--- a/dmd/func.c
+++ b/dmd/func.c
@@ -2818,13 +2818,13 @@ void NewDeclaration::semantic(Scope *sc)
     TypeFunction *tf = (TypeFunction *)type;
     if (Argument::dim(tf->parameters) < 1)
     {
-	error("at least one argument of type uint expected");
+	error("at least one argument of type size_t expected");
     }
     else
     {
 	Argument *a = Argument::getNth(tf->parameters, 0);
-	if (!a->type->equals(Type::tuns32))
-	    error("first argument must be type uint, not %s", a->type->toChars());
+	if (!a->type->equals(Type::tsize_t))
+	    error("first argument must be type size_t, not %s", a->type->toChars());
     }
 
     FuncDeclaration::semantic(sc);