diff --git a/tools/qfcc/include/class.h b/tools/qfcc/include/class.h
index 726a272be..7f7f0920d 100644
--- a/tools/qfcc/include/class.h
+++ b/tools/qfcc/include/class.h
@@ -48,6 +48,7 @@ typedef struct class_type_s {
 
 typedef struct class_s {
 	int         defined;
+	int         interface_declared;
 	const char *name;
 	struct class_s *super_class;
 	struct category_s *categories;
diff --git a/tools/qfcc/source/class.c b/tools/qfcc/source/class.c
index 574a484b9..8e2d458e1 100644
--- a/tools/qfcc/source/class.c
+++ b/tools/qfcc/source/class.c
@@ -1042,7 +1042,10 @@ class_find_ivar (class_t *class, int vis, const char *name)
 	symbol_t   *ivar;
 
 	if (!class->ivars) {
-		error (0, "accessing incomplete type %s", class->name);
+		if (!class->interface_declared) {
+			class->interface_declared = 1;
+			error (0, "accessing incomplete type %s", class->name);
+		}
 		return 0;
 	}
 	ivar = symtab_lookup (class->ivars, name);
@@ -1119,6 +1122,11 @@ class_message_response (class_t *class, int class_msg, expr_t *sel)
 	if (!selector)
 		return 0;
 	if (class && class->type != &type_obj_object) {
+		if (!class->interface_declared) {
+			class->interface_declared = 1;
+			warning (0, "cannot find interface declaration for `%s'",
+					 class->name);
+		}
 		while (c) {
 			for (cat = c->categories; cat; cat = cat->next) {
 				for (m = cat->methods->head; m; m = m->next) {
diff --git a/tools/qfcc/source/qc-parse.y b/tools/qfcc/source/qc-parse.y
index 3966b9cf9..a99f8c6b5 100644
--- a/tools/qfcc/source/qc-parse.y
+++ b/tools/qfcc/source/qc-parse.y
@@ -1612,6 +1612,7 @@ new_class_name
 				$1 = check_redefined ($1);
 				$$ = get_class ($1, 1);
 			}
+			$$->interface_declared = 1;
 			current_class = &$$->class_type;
 			if (!$1->table)
 				symtab_addsymbol (current_symtab, $1);
@@ -1630,10 +1631,12 @@ class_with_super
 new_class_with_super
 	: new_class_name ':' class_name
 		{
-			if (!$3->ivars) {
+			if (!$3->interface_declared) {
+				$3->interface_declared = 1;
 				error (0, "cannot find interface declaration for `%s', "
 					   "superclass of `%s'", $3->name, $1->name);
 			}
+			$1->interface_declared = 1;
 			$1->super_class = $3;
 			$$ = $1;
 		}