diff --git a/html.h b/html.h
index b4b3df9..c490655 100644
--- a/html.h
+++ b/html.h
@@ -12,7 +12,7 @@
 #define StrmyUFgets(f) StrmyISgets((f)->stream)
 #define UFgetc(f) ISgetc((f)->stream)
 #define UFundogetc(f) ISundogetc((f)->stream)
-#define UFclose(f) (void)(ISclose((f)->stream) == 0 && ((f)->stream = NULL))
+#define UFclose(f) if (ISclose((f)->stream) == 0) {(f)->stream = NULL ;}
 #define UFfileno(f) ISfileno((f)->stream)
 
 struct cmdtable {