diff --git a/renderdoc/driver/vulkan/wrappers/vk_resource_funcs.cpp b/renderdoc/driver/vulkan/wrappers/vk_resource_funcs.cpp
index c3c58541d..c19f5e62f 100644
--- a/renderdoc/driver/vulkan/wrappers/vk_resource_funcs.cpp
+++ b/renderdoc/driver/vulkan/wrappers/vk_resource_funcs.cpp
@@ -593,6 +593,8 @@ bool WrappedVulkan::Serialise_vkUnmapMemory(SerialiserType &ser, VkDevice device
     MapData = (byte *)state->mappedPtr + MapOffset;
   }
 
+  SERIALISE_ELEMENT(MapOffset);
+
   if(IsReplayingAndReading())
   {
     VkResult vkr = ObjDisp(device)->MapMemory(Unwrap(device), Unwrap(memory), MapOffset, MapSize, 0,
@@ -601,8 +603,6 @@ bool WrappedVulkan::Serialise_vkUnmapMemory(SerialiserType &ser, VkDevice device
       RDCERR("Error mapping memory on replay: %s", ToStr(vkr).c_str());
   }
 
-  SERIALISE_ELEMENT(MapOffset);
-
   // not using SERIALISE_ELEMENT_ARRAY so we can deliberately avoid allocation - we serialise
   // directly into upload memory
   ser.Serialise("MapData", MapData, MapSize, SerialiserFlags::NoFlags);