diff --git a/reactos/dll/ntdll/ldr/startup.c b/reactos/dll/ntdll/ldr/startup.c
index 80a94a89051..6ee49063626 100644
--- a/reactos/dll/ntdll/ldr/startup.c
+++ b/reactos/dll/ntdll/ldr/startup.c
@@ -27,6 +27,8 @@ static RTL_CRITICAL_SECTION PebLock;
 static RTL_CRITICAL_SECTION LoaderLock;
 static RTL_BITMAP TlsBitMap;
 static RTL_BITMAP TlsExpansionBitMap;
+static volatile BOOLEAN LdrpInitialized = FALSE;
+static LONG LdrpInitLock = 0;
 
 #define VALUE_BUFFER_SIZE 256
 
@@ -250,11 +252,11 @@ finish:
     return FALSE;
 }
 
+static
 VOID
-NTAPI
-LdrpInit(PCONTEXT Context,
-         PVOID SystemArgument1,
-         PVOID SystemArgument2)
+LdrpInit2(PCONTEXT Context,
+          PVOID SystemArgument1,
+          PVOID SystemArgument2)
 {
     PIMAGE_NT_HEADERS NTHeaders;
     PEPFUNC EntryPoint;
@@ -273,8 +275,6 @@ LdrpInit(PCONTEXT Context,
     ImageBase = Peb->ImageBaseAddress;
     DPRINT("ImageBase %p\n", ImageBase);
 
-  if (NtCurrentPeb()->Ldr == NULL)
-  {
     if (ImageBase <= (PVOID) 0x1000)
     {
         DPRINT("ImageBase is null\n");
@@ -432,10 +432,7 @@ LdrpInit(PCONTEXT Context,
     LdrpLoadUserModuleSymbols(NtModule);
 
 #endif /* DBG || KDBG */
-  }
 
-  if (NtCurrentPeb()->Ldr->Initialized == FALSE)
-  {
     /* add entry for executable (becomes first list entry) */
     ExeModule = (PLDR_DATA_TABLE_ENTRY)
                  RtlAllocateHeap(Peb->ProcessHeap,
@@ -500,7 +497,32 @@ LdrpInit(PCONTEXT Context,
     /* Break into debugger */
     if (Peb->BeingDebugged)
         DbgBreakPoint();
-  }
+}
+
+VOID
+NTAPI
+LdrpInit(PCONTEXT Context,
+         PVOID SystemArgument1,
+         PVOID SystemArgument2)
+{
+    if (!LdrpInitialized)
+    {
+        if (!_InterlockedExchange(&LdrpInitLock, 1))
+        {
+            LdrpInit2(Context, SystemArgument1, SystemArgument2);
+            LdrpInitialized = TRUE;
+        }
+        else
+        {
+            LARGE_INTEGER Interval = {{-200000, -1}};
+
+            do
+            {
+                NtDelayExecution(FALSE, &Interval);
+            }
+            while (!LdrpInitialized);
+        }
+    }
 
     /* attach the thread */
     RtlEnterCriticalSection(NtCurrentPeb()->LoaderLock);