diff --git a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-SkeletonLit-ForwardPass-URP.hlsl b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-SkeletonLit-ForwardPass-URP.hlsl
index f23058283..ec1e10c4a 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-SkeletonLit-ForwardPass-URP.hlsl
+++ b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-SkeletonLit-ForwardPass-URP.hlsl
@@ -12,7 +12,7 @@
 #define SKELETONLIT_RECEIVE_SHADOWS
 #endif
 
-#if !defined(DYNAMICLIGHTMAP_ON) && !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2))
+#if !defined(DYNAMICLIGHTMAP_ON) && !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2)) && defined(__PROBEVOLUME_HLSL__)
 #define USE_ADAPTIVE_PROBE_VOLUMES
 #endif
 
diff --git a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-Sprite-ForwardPass-URP.hlsl b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-Sprite-ForwardPass-URP.hlsl
index b667d4d99..726a21df0 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-Sprite-ForwardPass-URP.hlsl
+++ b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/Shaders/Include/Spine-Sprite-ForwardPass-URP.hlsl
@@ -18,7 +18,7 @@
 	#define NEEDS_POSITION_WS
 #endif
 
-#if !defined(DYNAMICLIGHTMAP_ON) && !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2))
+#if !defined(DYNAMICLIGHTMAP_ON) && !defined(LIGHTMAP_ON) && (defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2)) && defined(__PROBEVOLUME_HLSL__)
 #define USE_ADAPTIVE_PROBE_VOLUMES
 #endif
 
diff --git a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
index 756eb241f..6f21598b5 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
+++ b/spine-unity/Modules/com.esotericsoftware.spine.urp-shaders/package.json
@@ -2,7 +2,7 @@
   "name": "com.esotericsoftware.spine.urp-shaders",
   "displayName": "Spine Universal RP Shaders",
   "description": "This plugin provides universal render pipeline (URP) shaders for the spine-unity runtime.\n\nPrerequisites:\nIt requires a working installation of the spine-unity runtime, version 4.3.20 or newer.\n(See http://esotericsoftware.com/git/spine-runtimes/spine-unity)",
-  "version": "4.3.20",
+  "version": "4.3.21",
   "unity": "2019.3",
   "author": {
     "name": "Esoteric Software",