diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 8076e19a99..361832323c 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -1956,6 +1956,11 @@ void P_SetLineID (line_t *ld)
 		case Static_Init:
 			if (ld->args[1] == Init_SectorLink) ld->id = ld->args[0];
 			break;
+
+		case Line_SetPortal:
+		case Line_SetVisualPortal:
+			ld->id = ld->args[1]; // 0 = target id, 1 = this id, 2 = plane anchor
+			break;
 		}
 	}
 }