diff --git a/src/OLEDUIPlus.cpp b/src/OLEDUIPlus.cpp
index 5e4d644..6b1b0d5 100644
--- a/src/OLEDUIPlus.cpp
+++ b/src/OLEDUIPlus.cpp
@@ -311,8 +311,14 @@ int OLEDUIPlus::extendOn(void)
         if (false == _displayon) {
             if (_oledon != nullptr)
                 _oledon();
-            if (_haveOnOffOverlay)
+            if (_haveOnOffOverlay) {
                 startAnim(1);
+            } else {
+#if defined(OLED_REAL_OFF)
+                _oled->displayOn();
+#endif
+                _displayon = true;
+            }
             retval = 1; // musime rozsvitit displej
         }
     }