Index: head/share/misc/committers-ports.dot
===================================================================
--- head/share/misc/committers-ports.dot
+++ head/share/misc/committers-ports.dot
@@ -40,7 +40,7 @@
 
 # Current ports committers go here. Try to keep things sorted.
 
-0mp [label="Mateusz Piotrowski\n0mp@FreeBSD.org\n2018/06/16"]
+"0mp" [label="Mateusz Piotrowski\n0mp@FreeBSD.org\n2018/06/16"]
 ache [label="Andrey Chernov\nache@FreeBSD.org\n1994/11/15"]
 acm [label="Jose Alonso Cardenas Marquez\nacm@FreeBSD.org\n2006/07/18"]
 adamw [label="Adam Weinberger\nadamw@FreeBSD.org\n2002/10/16"]
@@ -481,7 +481,7 @@
 koobs -> woodsb02
 koobs -> xmj
 
-krion -> 0mp
+krion -> "0mp"
 krion -> brooks
 krion -> miwi
 krion -> novel
@@ -527,7 +527,7 @@
 makc -> jhale
 makc -> rakuco
 
-mat -> 0mp
+mat -> "0mp"
 mat -> bmah
 mat -> dteske
 mat -> dvl