diff --git a/dlls/kernel/process.c b/dlls/kernel/process.c
index 33f9ee1..d50cb7d 100644
--- a/dlls/kernel/process.c
+++ b/dlls/kernel/process.c
@@ -2460,6 +2464,7 @@ HANDLE WINAPI OpenProcess( DWORD access,
     OBJECT_ATTRIBUTES   attr;
     CLIENT_ID           cid;
 
+if (access & PROCESS_VM_WRITE) return NULL;
     cid.UniqueProcess = (HANDLE)id;
     cid.UniqueThread = 0; /* FIXME ? */