diff --git a/src/apps/terminal/TermApp.cpp b/src/apps/terminal/TermApp.cpp
index 0cf839cc8e..855409720b 100644
--- a/src/apps/terminal/TermApp.cpp
+++ b/src/apps/terminal/TermApp.cpp
@@ -333,7 +333,7 @@ TermApp::_SanitizeIDs(BMessage* data, uint8* windows, ssize_t length)
 			continue;
 
 		BString id("id-");
-		id << i;
+		id << i + 1;
 
 		team_id team;
 		if (data->FindInt32(id.String(), &team) != B_OK)