diff --git a/dmd/func.c b/dmd/func.c
index 9414d978..a18651ea 100644
--- a/dmd/func.c
+++ b/dmd/func.c
@@ -2566,7 +2566,7 @@ void StaticDtorDeclaration::semantic(Scope *sc)
 	Statement *s = new DeclarationStatement(0, v);
 	sa->push(s);
 	Expression *e = new IdentifierExp(0, id);
-	e = new AddAssignExp(0, e, new IntegerExp(-1));
+	e = new AddAssignExp(0, e, new IntegerExp((uint64_t)-1));
 	e = new EqualExp(TOKnotequal, 0, e, new IntegerExp(0));
 	s = new IfStatement(0, NULL, e, new ReturnStatement(0, NULL), NULL);
 	sa->push(s);
diff --git a/dmd2/func.c b/dmd2/func.c
index 62967637..1b468986 100644
--- a/dmd2/func.c
+++ b/dmd2/func.c
@@ -2722,7 +2722,7 @@ void StaticDtorDeclaration::semantic(Scope *sc)
 	Statement *s = new DeclarationStatement(0, v);
 	sa->push(s);
 	Expression *e = new IdentifierExp(0, id);
-	e = new AddAssignExp(0, e, new IntegerExp(-1));
+	e = new AddAssignExp(0, e, new IntegerExp((uint64_t)-1));
 	e = new EqualExp(TOKnotequal, 0, e, new IntegerExp(0));
 	s = new IfStatement(0, NULL, e, new ReturnStatement(0, NULL), NULL);
 	sa->push(s);