diff --git a/PowerEditor/src/Notepad_plus.cpp b/PowerEditor/src/Notepad_plus.cpp
index abd431799..67a7e60dd 100644
--- a/PowerEditor/src/Notepad_plus.cpp
+++ b/PowerEditor/src/Notepad_plus.cpp
@@ -850,8 +850,8 @@ void Notepad_plus::saveDockingParams()
 				}
 				floatContArray[floatCont] = 1;
 			}
-
-			vPluginDockInfo.push_back(nppGUI._dockingData._pluginDockInfo[i]);
+			if (i < nppGUI._dockingData._pluginDockInfo.size()) // to prevent from crash in debug mode
+				vPluginDockInfo.push_back(nppGUI._dockingData._pluginDockInfo[i]);
 		}
 	}