diff --git a/Changelog.md b/Changelog.md
index d0f82533c..8b52a6776 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -118,4 +118,5 @@ Be aware that code written for 1.9 will not work out of the box because DotSpati
 - Legend drag line so it doesn't look as if you can move a layer in between categories (#1008)
 - Legend selection to be able to select features of a category (#1008)
 - Some errors in SetSelectable plugin (#1008)
+- Crash when attempting to use a serial GPS device on Mono
 - Clear the selection inside FeatureLayer.RemoveSelectedFeatures so the removed features are no longer contained when IFeatureSet.FeatureRemoved is raised
\ No newline at end of file
diff --git a/Contributors b/Contributors
index f9e6c98a3..d85f95214 100644
--- a/Contributors
+++ b/Contributors
@@ -48,4 +48,5 @@ Tomaso Tonelli <tomaso.tonelli@gmail.com>
 Teva Veluppillai
 Peder Wikstrom <peder.wikstrom@treesys.se>
 Chris Wilson
-Ping Yang
\ No newline at end of file
+Ping Yang
+Trent Muhr
\ No newline at end of file
diff --git a/Source/DotSpatial.Positioning.Compact/GPS/Devices/SerialPort.cs b/Source/DotSpatial.Positioning.Compact/GPS/Devices/SerialPort.cs
index db309218b..00253940c 100644
--- a/Source/DotSpatial.Positioning.Compact/GPS/Devices/SerialPort.cs
+++ b/Source/DotSpatial.Positioning.Compact/GPS/Devices/SerialPort.cs
@@ -30,6 +30,7 @@ internal class SerialPort
 #endif
 
         private StreamReader _Reader;
+        private bool onMono = Type.GetType("Mono.Runtime") != null;
 
         #region Constructors
 
@@ -59,7 +60,8 @@ public SerialPort(string portName, int baudRate, Parity parity, int dataBits, St
             NewLine = "\r\n";
             WriteBufferSize = NmeaReader.IdealNmeaBufferSize;
             ReadBufferSize = NmeaReader.IdealNmeaBufferSize; 
-            ReceivedBytesThreshold = 65535;  // We don't need this event, so max out the threshold
+            if (!onMono) // ReceivedBytesThreshold is not implemented on mono, thus throwing an exception.
+                ReceivedBytesThreshold = 65535;  // We don't need this event, so max out the threshold
             Encoding = Encoding.ASCII;
         }
 #endif
diff --git a/Source/DotSpatial.Positioning/SerialPort.cs b/Source/DotSpatial.Positioning/SerialPort.cs
index 3485b0d6b..39d1287b9 100644
--- a/Source/DotSpatial.Positioning/SerialPort.cs
+++ b/Source/DotSpatial.Positioning/SerialPort.cs
@@ -48,6 +48,7 @@ internal class SerialPort
         ///
         /// </summary>
         private StreamReader _reader;
+        private bool onMono = Type.GetType("Mono.Runtime") != null;
 
         #region Constructors
 
@@ -97,7 +98,8 @@ public SerialPort(string portName, int baudRate, Parity parity, int dataBits, St
             NewLine = "\r\n";
             WriteBufferSize = NmeaReader.IDEAL_NMEA_BUFFER_SIZE;
             ReadBufferSize = NmeaReader.IDEAL_NMEA_BUFFER_SIZE;
-            ReceivedBytesThreshold = 65535;  // We don't need this event, so max out the threshold
+            if (!onMono) // ReceivedBytesThreshold is not implemented on mono, thus throwing an exception.
+                ReceivedBytesThreshold = 65535;  // We don't need this event, so max out the threshold
             Encoding = Encoding.ASCII;
         }