diff --git a/Source/Windows/ARM64EC/Module.cpp b/Source/Windows/ARM64EC/Module.cpp
index 075cf9e32..bc085b92d 100644
--- a/Source/Windows/ARM64EC/Module.cpp
+++ b/Source/Windows/ARM64EC/Module.cpp
@@ -543,7 +543,7 @@ NTSTATUS ProcessInit() {
   Exception::HandlerConfig.emplace();
 
   const auto NtDll = GetModuleHandle("ntdll.dll");
-  const bool IsWine = !!GetProcAddress(NtDll, "__wine_get_version");
+  const bool IsWine = !!GetProcAddress(NtDll, "wine_get_version");
   OvercommitTracker.emplace(IsWine);
 
   {
diff --git a/Source/Windows/Common/OvercommitTracker.h b/Source/Windows/Common/OvercommitTracker.h
index 63a707cd6..797c4c748 100644
--- a/Source/Windows/Common/OvercommitTracker.h
+++ b/Source/Windows/Common/OvercommitTracker.h
@@ -38,7 +38,7 @@ public:
       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;
diff --git a/Source/Windows/WOW64/Module.cpp b/Source/Windows/WOW64/Module.cpp
index c2a3ca3cc..8a6e55228 100644
--- a/Source/Windows/WOW64/Module.cpp
+++ b/Source/Windows/WOW64/Module.cpp
@@ -466,7 +466,7 @@ void BTCpuProcessInit() {
   SyscallHandler = fextl::make_unique<WowSyscallHandler>();
   Context::HandlerConfig.emplace();
   const auto NtDll = GetModuleHandle("ntdll.dll");
-  const bool IsWine = !!GetProcAddress(NtDll, "__wine_get_version");
+  const bool IsWine = !!GetProcAddress(NtDll, "wine_get_version");
   OvercommitTracker.emplace(IsWine);
 
   {