Index: /trunk/src/VBox/Runtime/r3/posix/process-posix.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/posix/process-posix.cpp	(revision 29327)
+++ /trunk/src/VBox/Runtime/r3/posix/process-posix.cpp	(revision 29328)
@@ -83,5 +83,5 @@
     AssertPtrReturn(pszExec, VERR_INVALID_POINTER);
     AssertReturn(*pszExec, VERR_INVALID_PARAMETER);
-    AssertReturn(!(fFlags & ~(RTPROC_FLAGS_DAEMONIZE_DEPRECATED | RTPROC_FLAGS_DETACHED)), VERR_INVALID_PARAMETER);
+    AssertReturn(!(fFlags & ~(RTPROC_FLAGS_DAEMONIZE_DEPRECATED | RTPROC_FLAGS_DETACHED | RTPROC_FLAGS_SERVICE)), VERR_INVALID_PARAMETER);
     AssertReturn(!(fFlags & RTPROC_FLAGS_DETACHED) || !phProcess, VERR_INVALID_PARAMETER);
     AssertReturn(hEnv != NIL_RTENV, VERR_INVALID_PARAMETER);