diff --git a/sys/src/cmd/troff/n5.c b/sys/src/cmd/troff/n5.c
index a1edaf5d5..4f0eed93f 100644
--- a/sys/src/cmd/troff/n5.c
+++ b/sys/src/cmd/troff/n5.c
@@ -683,6 +683,7 @@ void caseif1(int x)
 		if (TROFF)
 			true++;
 		break;
+	case 'h':
 	case ' ':
 		break;
 	default: