diff --git a/src/corelib/plugin/qlibrary_unix.cpp b/src/corelib/plugin/qlibrary_unix.cpp
index 1376462ff33..03f6eb8d331 100644
--- a/src/corelib/plugin/qlibrary_unix.cpp
+++ b/src/corelib/plugin/qlibrary_unix.cpp
@@ -257,8 +257,12 @@ bool QLibraryPrivate::load_sys()
 
 bool QLibraryPrivate::unload_sys()
 {
-#if !defined(Q_OS_VXWORKS)            // Unloading on VxWorks causes crashes in QtDeclarative autotests
-    if (dlclose(pHnd.loadAcquire())) {
+    bool doTryUnload = true;
+#ifndef RTLD_NODELETE
+    if (loadHints() & QLibrary::PreventUnloadHint)
+        doTryUnload = false;
+#endif
+    if (doTryUnload && dlclose(pHnd.loadAcquire())) {
         const char *error = dlerror();
 #if defined (Q_OS_QNX)
         // Workaround until fixed in QNX; fixes crash in
@@ -271,7 +275,6 @@ bool QLibraryPrivate::unload_sys()
         return false;
     }
     errorString.clear();
-#endif
     return true;
 }