diff --git a/RenderSystems/Vulkan/include/OgreVulkanRenderSystem.h b/RenderSystems/Vulkan/include/OgreVulkanRenderSystem.h
index c4b232eb881..c47dc58d037 100644
--- a/RenderSystems/Vulkan/include/OgreVulkanRenderSystem.h
+++ b/RenderSystems/Vulkan/include/OgreVulkanRenderSystem.h
@@ -47,6 +47,9 @@ namespace Ogre
     * Implementation of Vulkan as a rendering system.
     *  @{
     */
+
+    #define USE_VALIDATION_LAYERS 0
+
     class _OgreVulkanExport VulkanRenderSystem : public RenderSystem
     {
         friend class VulkanSampler;
diff --git a/RenderSystems/Vulkan/src/OgreVulkanRenderSystem.cpp b/RenderSystems/Vulkan/src/OgreVulkanRenderSystem.cpp
index bb510c94bf2..3f566e954e4 100644
--- a/RenderSystems/Vulkan/src/OgreVulkanRenderSystem.cpp
+++ b/RenderSystems/Vulkan/src/OgreVulkanRenderSystem.cpp
@@ -52,8 +52,6 @@ THE SOFTWARE.
 #include "OgreVulkanWindow.h"
 #include "OgrePixelFormat.h"
 
-#define USE_VALIDATION_LAYERS 0
-
 namespace Ogre
 {
     static const uint32 VERTEX_ATTRIBUTE_INDEX[VES_COUNT] =