diff --git a/renderdoc/driver/vulkan/vk_common.cpp b/renderdoc/driver/vulkan/vk_common.cpp
index c745daa69..3e5f4a43b 100644
--- a/renderdoc/driver/vulkan/vk_common.cpp
+++ b/renderdoc/driver/vulkan/vk_common.cpp
@@ -240,6 +240,10 @@ bool VkInitParams::IsSupportedVersion(uint64_t ver)
   if(ver == CurrentVersion)
     return true;
 
+  // 0xD -> 0xE - fixed serialisation directly of size_t members in VkDescriptorUpdateTemplateEntry
+  if(ver == 0xD)
+    return true;
+
   // 0xC -> 0xD - supported multiple queues. This didn't cause a large change to the serialisation
   // but there were some slight inconsistencies that required a version bump
   if(ver == 0xC)
diff --git a/renderdoc/driver/vulkan/vk_core.h b/renderdoc/driver/vulkan/vk_core.h
index aa9b6b326..ff2c86228 100644
--- a/renderdoc/driver/vulkan/vk_core.h
+++ b/renderdoc/driver/vulkan/vk_core.h
@@ -55,7 +55,7 @@ struct VkInitParams
   uint32_t GetSerialiseSize();
 
   // check if a frame capture section version is supported
-  static const uint64_t CurrentVersion = 0xD;
+  static const uint64_t CurrentVersion = 0xE;
   static bool IsSupportedVersion(uint64_t ver);
 };
 
diff --git a/renderdoc/driver/vulkan/vk_serialise.cpp b/renderdoc/driver/vulkan/vk_serialise.cpp
index 2012c2496..1dde4bee6 100644
--- a/renderdoc/driver/vulkan/vk_serialise.cpp
+++ b/renderdoc/driver/vulkan/vk_serialise.cpp
@@ -2235,8 +2235,25 @@ void DoSerialise(SerialiserType &ser, VkDescriptorUpdateTemplateEntry &el)
   SERIALISE_MEMBER(dstArrayElement);
   SERIALISE_MEMBER(descriptorCount);
   SERIALISE_MEMBER(descriptorType);
-  SERIALISE_MEMBER(offset);
-  SERIALISE_MEMBER(stride);
+
+  // these fields are size_t and should not be serialised as-is. They're not used so we can just
+  // serialise them as uint64_t. Unfortunately this wasn't correct initially and they were
+  // serialised as-is making a 32-bit/64-bit incompatibility, so for older versions all we can do is
+  // continue to serialise them as size_t as it's impossible to know which one was used.
+  if(ser.VersionAtLeast(0xE))
+  {
+    uint64_t offset = el.offset;
+    uint64_t stride = el.stride;
+    ser.Serialise("offset", offset);
+    ser.Serialise("stride", stride);
+    el.offset = (size_t)offset;
+    el.stride = (size_t)stride;
+  }
+  else
+  {
+    SERIALISE_MEMBER(offset);
+    SERIALISE_MEMBER(stride);
+  }
 }
 
 template <typename SerialiserType>