diff --git a/sysutils/screen/Makefile b/sysutils/screen/Makefile
index 34625ae2bf9d..28b433032194 100644
--- a/sysutils/screen/Makefile
+++ b/sysutils/screen/Makefile
@@ -2,7 +2,7 @@
 
 PORTNAME=	screen
 PORTVERSION=	4.9.0
-PORTREVISION=	5
+PORTREVISION=	6
 CATEGORIES=	sysutils
 MASTER_SITES=	GNU \
 		ftp://ftp.gnu.org/gnu/screen/ \
@@ -78,7 +78,7 @@ CFLAGS+=	-DCOLORS256
 CFLAGS+=	-DNONETHACK
 .endif
 
-.if ! ${PORT_OPTIONS:MNOSOCKETDIR}
+.if ${PORT_OPTIONS:MNOSOCKETDIR}
 CONFIGURE_ARGS+=	--disable-socket-dir
 .endif