diff --git a/dlls/ntdll/unix/virtual.c b/dlls/ntdll/unix/virtual.c
index eaaf7242883..785583a340a 100644
--- a/dlls/ntdll/unix/virtual.c
+++ b/dlls/ntdll/unix/virtual.c
@@ -2542,6 +2542,7 @@ static void init_teb( TEB *teb, PEB *peb )
             PtrToUlong( &teb64->ActivationContextStack.FrameListCache );
     teb64->StaticUnicodeString.Buffer = PtrToUlong( teb64->StaticUnicodeBuffer );
     teb64->StaticUnicodeString.MaximumLength = sizeof( teb64->StaticUnicodeBuffer );
+    teb->WOW32Reserved = __wine_syscall_dispatcher;
 #endif
     teb->Peb = peb;
     teb->Tib.Self = &teb->Tib;