diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp
index 205cc7b53e..e5e567de14 100644
--- a/src/core/hle/kernel/vm_manager.cpp
+++ b/src/core/hle/kernel/vm_manager.cpp
@@ -55,7 +55,7 @@ VMManager::VMAHandle VMManager::FindVMA(VAddr target) const {
 }
 
 ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target,
-        std::shared_ptr<std::vector<u8>> block, u32 offset, u32 size, MemoryState state) {
+        std::shared_ptr<std::vector<u8>> block, size_t offset, u32 size, MemoryState state) {
     ASSERT(block != nullptr);
     ASSERT(offset + size <= block->size());
 
diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h
index b3795a94a3..a8cf0d0d4b 100644
--- a/src/core/hle/kernel/vm_manager.h
+++ b/src/core/hle/kernel/vm_manager.h
@@ -75,7 +75,7 @@ struct VirtualMemoryArea {
     /// Memory block backing this VMA.
     std::shared_ptr<std::vector<u8>> backing_block = nullptr;
     /// Offset into the backing_memory the mapping starts from.
-    u32 offset = 0;
+    size_t offset = 0;
 
     // Settings for type = BackingMemory
     /// Pointer backing this VMA. It will not be destroyed or freed when the VMA is removed.
@@ -141,7 +141,7 @@ public:
      * @param state MemoryState tag to attach to the VMA.
      */
     ResultVal<VMAHandle> MapMemoryBlock(VAddr target, std::shared_ptr<std::vector<u8>> block,
-            u32 offset, u32 size, MemoryState state);
+            size_t offset, u32 size, MemoryState state);
 
     /**
      * Maps an unmanaged host memory pointer at a given address.