diff --git a/intern/cycles/device/hiprt/device_impl.cpp b/intern/cycles/device/hiprt/device_impl.cpp
index 92f71419e21..05b738108f5 100644
--- a/intern/cycles/device/hiprt/device_impl.cpp
+++ b/intern/cycles/device/hiprt/device_impl.cpp
@@ -284,7 +284,7 @@ bool HIPRTDevice::load_kernels(const uint kernel_features)
    * This is necessary since objects may be reported to have motion if the Vector pass is
    * active, but may still need to be rendered without motion blur if that isn't active as well.
    */
-  use_motion_blur |= kernel_features & KERNEL_FEATURE_OBJECT_MOTION;
+  use_motion_blur = use_motion_blur || (kernel_features & KERNEL_FEATURE_OBJECT_MOTION);
 
   /* get kernel */
   const char *kernel_name = "kernel";
diff --git a/intern/cycles/device/metal/device_impl.mm b/intern/cycles/device/metal/device_impl.mm
index b71316e890e..91e0d721d31 100644
--- a/intern/cycles/device/metal/device_impl.mm
+++ b/intern/cycles/device/metal/device_impl.mm
@@ -456,7 +456,7 @@ bool MetalDevice::load_kernels(const uint _kernel_features)
      * This is necessary since objects may be reported to have motion if the Vector pass is
      * active, but may still need to be rendered without motion blur if that isn't active as well.
      */
-    motion_blur |= kernel_features & KERNEL_FEATURE_OBJECT_MOTION;
+    motion_blur = motion_blur || (kernel_features & KERNEL_FEATURE_OBJECT_MOTION);
 
     /* Only request generic kernels if they aren't cached in memory. */
     refresh_source_and_kernels_md5(PSO_GENERIC);