diff --git a/lang/ghc/Makefile b/lang/ghc/Makefile
index ff989c064293..36ef1a510ad9 100644
--- a/lang/ghc/Makefile
+++ b/lang/ghc/Makefile
@@ -3,6 +3,7 @@
 
 PORTNAME=	ghc
 PORTVERSION=	${GHC_VERSION}
+PORTREVISION=	1
 CATEGORIES=	lang haskell
 MASTER_SITES=	https://www.haskell.org/ghc/dist/${PORTVERSION}/:source \
 		LOCAL/arrowd/:boot \
diff --git a/lang/ghc/files/patch-rts_posix_Itimer.c b/lang/ghc/files/patch-rts_posix_Itimer.c
new file mode 100644
index 000000000000..a6d2574ebde8
--- /dev/null
+++ b/lang/ghc/files/patch-rts_posix_Itimer.c
@@ -0,0 +1,11 @@
+--- rts/posix/Itimer.c.orig	2020-02-24 23:55:56 UTC
++++ rts/posix/Itimer.c
+@@ -48,7 +48,7 @@
+ #define USE_PTHREAD_FOR_ITIMER
+ #endif
+ 
+-#if defined(freebsd_HOST_OS) && defined(THREADED_RTS)
++#if defined(freebsd_HOST_OS)
+ #define USE_PTHREAD_FOR_ITIMER
+ #endif
+