diff --git a/Source/Core/DolphinWX/Src/ConfigMain.cpp b/Source/Core/DolphinWX/Src/ConfigMain.cpp
index 05b5849595..9bbb1e39b3 100644
--- a/Source/Core/DolphinWX/Src/ConfigMain.cpp
+++ b/Source/Core/DolphinWX/Src/ConfigMain.cpp
@@ -435,8 +435,15 @@ void CConfigMain::AddRemoveISOPaths(wxCommandEvent& event)
 
 		if (dialog.ShowModal() == wxID_OK)
 		{
-			bRefreshList = true;
-			ISOPaths->Append(dialog.GetPath());
+			if (ISOPaths->FindString(dialog.GetPath()) != -1)
+			{
+				wxMessageBox(_("The chosen directory is already in the list"), _("Error"), wxOK);
+			}
+			else
+			{
+				bRefreshList = true;
+				ISOPaths->Append(dialog.GetPath());
+			}
 		}
 	}
 	else