diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index 8f4625ba005..e3f1e5a6cfc 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -452,7 +452,7 @@ anv_enumerate_devices(struct anv_instance *instance)
 
    instance->physicalDeviceCount = 0;
 
-   max_devices = drmGetDevices2(0, devices, sizeof(devices));
+   max_devices = drmGetDevices2(0, devices, ARRAY_SIZE(devices));
    if (max_devices < 1)
       return VK_ERROR_INCOMPATIBLE_DRIVER;