diff --git a/src/vulkan/util/vk_util.c b/src/vulkan/util/vk_util.c
index 841212034ec..543e1df4103 100644
--- a/src/vulkan/util/vk_util.c
+++ b/src/vulkan/util/vk_util.c
@@ -102,16 +102,16 @@ vk_spec_info_to_nir_spirv(const VkSpecializationInfo *spec_info,
       spec_entries[i].id = spec_info->pMapEntries[i].constantID;
       switch (entry.size) {
       case 8:
-         spec_entries[i].value.u64 = *(const uint64_t *)data;
+         memcpy(&spec_entries[i].value.u64, data, entry.size);
          break;
       case 4:
-         spec_entries[i].value.u32 = *(const uint32_t *)data;
+         memcpy(&spec_entries[i].value.u32, data, entry.size);
          break;
       case 2:
-         spec_entries[i].value.u16 = *(const uint16_t *)data;
+         memcpy(&spec_entries[i].value.u16, data, entry.size);
          break;
       case 1:
-         spec_entries[i].value.u8 = *(const uint8_t *)data;
+         memcpy(&spec_entries[i].value.u8, data, entry.size);
          break;
       case 0:
       default: