diff --git a/src/p_conversation.cpp b/src/p_conversation.cpp
index 3c631c4e9..9b1119e0d 100644
--- a/src/p_conversation.cpp
+++ b/src/p_conversation.cpp
@@ -914,7 +914,7 @@ public:
 	{
 		if (ev->type == EV_GUI_Event && ev->subtype == EV_GUI_Char && ev->data1 >= '0' && ev->data1 <= '9')
 		{ // Activate an item of type numberedmore (dialogue only)
-			mSelection = ev->data1 == '0' ? 10 : ev->data1 - '0';
+			mSelection = ev->data1 == '0' ? 9 : ev->data1 - '1';
 			return MenuEvent(MKEY_Enter, false);
 		}
 		return Super::Responder(ev);