diff --git a/tools/qfcc/include/class.h b/tools/qfcc/include/class.h
index e0285a7ca..e8de7f888 100644
--- a/tools/qfcc/include/class.h
+++ b/tools/qfcc/include/class.h
@@ -107,7 +107,7 @@ struct expr_s;
 struct method_s;
 struct symbol_s;
 
-int is_id (const struct type_s *type);
+int obj_is_id (const struct type_s *type);
 
 class_t *extract_class (class_type_t *class_type);
 const char *get_class_name (class_type_t *class_type, int pretty);
diff --git a/tools/qfcc/source/class.c b/tools/qfcc/source/class.c
index f659894e0..5bcc50e1d 100644
--- a/tools/qfcc/source/class.c
+++ b/tools/qfcc/source/class.c
@@ -174,7 +174,7 @@ static struct_def_t object_struct[] = {
 };
 
 int
-is_id (const type_t *type)
+obj_is_id (const type_t *type)
 {
 	if (type == &type_id)
 		return 1;
diff --git a/tools/qfcc/source/type.c b/tools/qfcc/source/type.c
index d9ca19fa4..a8b9f7ada 100644
--- a/tools/qfcc/source/type.c
+++ b/tools/qfcc/source/type.c
@@ -443,7 +443,7 @@ print_type_str (dstring_t *str, const type_t *type)
 			}
 			break;
 		case ev_pointer:
-			if (is_id (type)) {
+			if (obj_is_id (type)) {
 				dasprintf (str, "id");
 				if (type->t.fldptr.type->protos)
 					print_protocollist (str, type->t.fldptr.type->protos);
@@ -724,11 +724,11 @@ type_assignable (const type_t *dst, const type_t *src)
 	if (dst->type == ev_field && src->type == ev_field)
 		return 1;
 	// id = any class pointer
-	if (is_id (dst) && src->type == ev_pointer
+	if (obj_is_id (dst) && src->type == ev_pointer
 		&& (is_class (src->t.fldptr.type) || src == &type_Class))
 		return 1;
 	// any class pointer = id
-	if (is_id (src) && dst->type == ev_pointer
+	if (obj_is_id (src) && dst->type == ev_pointer
 		&& (is_class (dst->t.fldptr.type) || dst == &type_Class))
 		return 1;
 	// pointer = array