diff --git a/kernel/timer.c b/kernel/timer.c
index 59a28b1..a6c580a 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -92,24 +92,24 @@
 /* Functions below help us manage 'deferrable' flag */
 static inline unsigned int tbase_get_deferrable(tvec_base_t *base)
 {
-	return (unsigned int)((unsigned long)base & TBASE_DEFERRABLE_FLAG);
+	return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG);
 }
 
 static inline tvec_base_t *tbase_get_base(tvec_base_t *base)
 {
-	return (tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG);
+	return ((tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG));
 }
 
 static inline void timer_set_deferrable(struct timer_list *timer)
 {
-	timer->base = (tvec_base_t *)((unsigned long)timer->base |
-	                               TBASE_DEFERRABLE_FLAG);
+	timer->base = ((tvec_base_t *)((unsigned long)(timer->base) |
+	                               TBASE_DEFERRABLE_FLAG));
 }
 
 static inline void
 timer_set_base(struct timer_list *timer, tvec_base_t *new_base)
 {
-	timer->base = (tvec_base_t *)((unsigned long)new_base |
+	timer->base = (tvec_base_t *)((unsigned long)(new_base) |
 	                              tbase_get_deferrable(timer->base));
 }