diff --git a/devel/gpsim/Makefile b/devel/gpsim/Makefile
index 47351d9a9ca2..9367383330b8 100644
--- a/devel/gpsim/Makefile
+++ b/devel/gpsim/Makefile
@@ -2,9 +2,9 @@
 # $FreeBSD$
 
 PORTNAME=	gpsim
-PORTVERSION=	0.27.0
+PORTVERSION=	0.28.1
 CATEGORIES=	devel
-MASTER_SITES=	SF
+MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/${PORTVERSION:R}.0
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Software simulator for Microchip PIC microcontrollers
@@ -16,7 +16,7 @@ BUILD_DEPENDS=	gpasm:${PORTSDIR}/devel/gputils
 LIB_DEPENDS=	libpopt.so:${PORTSDIR}/devel/popt
 RUN_DEPENDS=	gpasm:${PORTSDIR}/devel/gputils
 
-USES=		libtool pathfix pkgconfig
+USES=		gmake libtool pathfix pkgconfig readline
 USE_GNOME=	glib20
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
diff --git a/devel/gpsim/distinfo b/devel/gpsim/distinfo
index 6c83d445617b..209d98b4e46d 100644
--- a/devel/gpsim/distinfo
+++ b/devel/gpsim/distinfo
@@ -1,2 +1,2 @@
-SHA256 (gpsim-0.27.0.tar.gz) = 204ed2a8aaf1b3021617544330997f4a508b811afce71fb9628b94406d5e59a2
-SIZE (gpsim-0.27.0.tar.gz) = 2465642
+SHA256 (gpsim-0.28.1.tar.gz) = d8d41fb530630e6df31db89a0ca630038395aed4d07c48859655468ed25658ed
+SIZE (gpsim-0.28.1.tar.gz) = 3206451
diff --git a/devel/gpsim/files/patch-modules__stimuli.cc b/devel/gpsim/files/patch-modules__stimuli.cc
deleted file mode 100644
index 7e2fdd54b5a9..000000000000
--- a/devel/gpsim/files/patch-modules__stimuli.cc
+++ /dev/null
@@ -1,33 +0,0 @@
---- modules/stimuli.cc.orig
-+++ modules/stimuli.cc
-@@ -216,7 +216,7 @@
-   //----------------------------------------------------------------------
-   //----------------------------------------------------------------------
- 
--  PulseGen::PulseGen(const char *_name=0)
-+  PulseGen::PulseGen(const char *_name)
-     : StimulusBase(_name, "\
- Pulse Generator\n\
-  Attributes:\n\
-@@ -402,13 +402,20 @@
-     setBreak(m_start_cycle + (*si).time, si);
- 
-   }
-+
-+  static bool compare_data_point(const ValueStimulusData &data_point1,
-+                                 const ValueStimulusData &data_point2)
-+  {
-+    return (data_point1.time < data_point2.time);
-+  }
-+
-   void PulseGen::put_data(ValueStimulusData &data_point)
-   {
-     list<ValueStimulusData>::iterator si;
-     si = find(samples.begin(), samples.end(), data_point);
-     if (si == samples.end()) {
-       samples.push_back(data_point);
--      samples.sort();
-+      samples.sort(compare_data_point);
-     } else {
-       delete (*si).v;
-       (*si).v = data_point.v;
diff --git a/devel/gpsim/files/patch-modules__switch.cc b/devel/gpsim/files/patch-modules__switch.cc
deleted file mode 100644
index ea720c76e191..000000000000
--- a/devel/gpsim/files/patch-modules__switch.cc
+++ /dev/null
@@ -1,11 +0,0 @@
---- modules/switch.cc.orig
-+++ modules/switch.cc
-@@ -582,7 +582,7 @@
- 
-   //========================================================================
- 
--  Switch::Switch(const char *_new_name=0)
-+  Switch::Switch(const char *_new_name)
-     : SwitchBase(_new_name, "\
- Two port switch\n\
-  Attributes:\n\
diff --git a/devel/gpsim/pkg-plist b/devel/gpsim/pkg-plist
index 70a2b799c1d9..4b23ecb964c8 100644
--- a/devel/gpsim/pkg-plist
+++ b/devel/gpsim/pkg-plist
@@ -44,7 +44,6 @@ include/gpsim/ioports.h
 include/gpsim/lxt_write.h
 include/gpsim/modules.h
 include/gpsim/operator.h
-include/gpsim/p12f182x.h
 include/gpsim/p12f6xx.h
 include/gpsim/p12x.h
 include/gpsim/p16f62x.h
@@ -57,6 +56,7 @@ include/gpsim/p16x7x.h
 include/gpsim/p16x8x.h
 include/gpsim/p17c75x.h
 include/gpsim/p18x.h
+include/gpsim/p1xf1xxx.h
 include/gpsim/packages.h
 include/gpsim/pic-instructions.h
 include/gpsim/pic-ioports.h
@@ -75,6 +75,7 @@ include/gpsim/pthread-wrap.h
 include/gpsim/rcon.h
 include/gpsim/registers.h
 include/gpsim/sim_context.h
+include/gpsim/spp.h
 include/gpsim/ssp.h
 include/gpsim/stimuli.h
 include/gpsim/symbol.h
@@ -91,6 +92,10 @@ lib/libgpsim.a
 lib/libgpsim.so
 lib/libgpsim.so.0
 lib/libgpsim.so.0.0.0
+lib/libgpsim_dht11.a
+lib/libgpsim_dht11.so
+lib/libgpsim_dht11.so.0
+lib/libgpsim_dht11.so.0.0.0
 lib/libgpsim_ds1307.a
 lib/libgpsim_ds1307.so
 lib/libgpsim_ds1307.so.0