diff --git a/src/vulkan/anv_private.h b/src/vulkan/anv_private.h
index 5bd50258c8a..0cd8ab6facd 100644
--- a/src/vulkan/anv_private.h
+++ b/src/vulkan/anv_private.h
@@ -83,18 +83,21 @@ typedef union _VK_LOADER_DATA {
 static inline uint32_t
 align_u32(uint32_t v, uint32_t a)
 {
+   assert(a != 0 && a == (a & -a));
    return (v + a - 1) & ~(a - 1);
 }
 
 static inline uint64_t
 align_u64(uint64_t v, uint64_t a)
 {
+   assert(a != 0 && a == (a & -a));
    return (v + a - 1) & ~(a - 1);
 }
 
 static inline int32_t
 align_i32(int32_t v, int32_t a)
 {
+   assert(a != 0 && a == (a & -a));
    return (v + a - 1) & ~(a - 1);
 }