diff --git a/Source/Windows/Common/OvercommitTracker.h b/Source/Windows/Common/OvercommitTracker.h
index 63a707cd6c..797c4c7481 100644
--- a/Source/Windows/Common/OvercommitTracker.h
+++ b/Source/Windows/Common/OvercommitTracker.h
@@ -38,7 +38,7 @@ class OvercommitTracker {
       if (IsWine) {
         MEMORY_BASIC_INFORMATION Info;
         NtQueryVirtualMemory(NtCurrentProcess(), reinterpret_cast<void*>(FaultAddress), MemoryBasicInformation, &Info, sizeof(Info), nullptr);
-        const auto CommitSize = reinterpret_cast<SIZE_T>(Info.BaseAddress) + Info.RegionSize - FaultAddress;
+        const auto CommitSize = reinterpret_cast<SIZE_T>(Info.BaseAddress) + Info.RegionSize - reinterpret_cast<SIZE_T>(Info.AllocationBase);
         VirtualAlloc(reinterpret_cast<void*>(Info.AllocationBase), CommitSize, MEM_COMMIT, PAGE_READWRITE);
       } else {
         static constexpr size_t MaxFaultCommitSize = 1024 * 64;