diff --git a/external/vulkancts/modules/vulkan/memory/vktMemoryPipelineBarrierTests.cpp b/external/vulkancts/modules/vulkan/memory/vktMemoryPipelineBarrierTests.cpp
index 9d7b006..0cf2170 100644
--- a/external/vulkancts/modules/vulkan/memory/vktMemoryPipelineBarrierTests.cpp
+++ b/external/vulkancts/modules/vulkan/memory/vktMemoryPipelineBarrierTests.cpp
@@ -7928,7 +7928,7 @@
 
 	DE_ASSERT(supportedLayoutCount > 0);
 
-	size_t nextLayoutNdx = ((size_t)rng.getUint64()) % (previousLayout == vk::VK_IMAGE_LAYOUT_UNDEFINED
+	size_t nextLayoutNdx = ((size_t)rng.getUint32()) % (previousLayout == vk::VK_IMAGE_LAYOUT_UNDEFINED
 														? supportedLayoutCount
 														: supportedLayoutCount - 1);