diff --git a/pptx/oxml/__init__.py b/pptx/oxml/__init__.py
index bb71d70d8..f02f7b7e2 100644
--- a/pptx/oxml/__init__.py
+++ b/pptx/oxml/__init__.py
@@ -235,19 +235,22 @@ def register_element_cls(nsptagname, cls):
 
 from .shapes.shared import (
     CT_ApplicationNonVisualDrawingProps, CT_LineProperties,
-    CT_NonVisualDrawingProps, CT_Placeholder, CT_Point2D, CT_PositiveSize2D,
+    CT_PresetLineDashProperties, CT_NonVisualDrawingProps,
+    CT_Placeholder, CT_Point2D, CT_PositiveSize2D,
     CT_ShapeProperties, CT_Transform2D
 )
-register_element_cls('a:ext',   CT_PositiveSize2D)
-register_element_cls('a:ln',    CT_LineProperties)
-register_element_cls('a:off',   CT_Point2D)
-register_element_cls('a:xfrm',  CT_Transform2D)
-register_element_cls('c:spPr',  CT_ShapeProperties)
-register_element_cls('p:cNvPr', CT_NonVisualDrawingProps)
-register_element_cls('p:nvPr',  CT_ApplicationNonVisualDrawingProps)
-register_element_cls('p:ph',    CT_Placeholder)
-register_element_cls('p:spPr',  CT_ShapeProperties)
-register_element_cls('p:xfrm',  CT_Transform2D)
+register_element_cls('a:ext',      CT_PositiveSize2D)
+register_element_cls('a:ln',       CT_LineProperties)
+register_element_cls('a:prstDash', CT_PresetLineDashProperties)
+register_element_cls('a:off',      CT_Point2D)
+register_element_cls('a:xfrm',     CT_Transform2D)
+register_element_cls('c:spPr',     CT_ShapeProperties)
+register_element_cls('p:cNvPr',    CT_NonVisualDrawingProps)
+register_element_cls('p:nvPr',     CT_ApplicationNonVisualDrawingProps)
+register_element_cls('p:ph',       CT_Placeholder)
+register_element_cls('p:spPr',     CT_ShapeProperties)
+register_element_cls('p:xfrm',     CT_Transform2D)
+
 
 
 from .shapes.table import (
diff --git a/pptx/oxml/shapes/shared.py b/pptx/oxml/shapes/shared.py
index 690b93a64..d6eed7eb9 100644
--- a/pptx/oxml/shapes/shared.py
+++ b/pptx/oxml/shapes/shared.py
@@ -10,7 +10,8 @@
 from ..ns import qn
 from ..simpletypes import (
     ST_Angle, ST_Coordinate, ST_Direction, ST_DrawingElementId, ST_LineWidth,
-    ST_PlaceholderSize, ST_PositiveCoordinate, XsdString, XsdUnsignedInt
+    ST_PlaceholderSize, ST_PositiveCoordinate, XsdString, XsdUnsignedInt,
+    ST_PresetLineDashVal
 )
 from ...util import Emu
 from ..xmlchemy import (
@@ -212,6 +213,8 @@ class CT_LineProperties(BaseOxmlElement):
             'a:headEnd', 'a:tailEnd', 'a:extLst'
         )
     )
+    eg_lineDashProperties = ZeroOrOne('a:prstDash', successors=())
+
     w = OptionalAttribute('w', ST_LineWidth, default=Emu(0))
 
     @property
@@ -221,6 +224,12 @@ def eg_fillProperties(self):
         """
         return self.eg_lineFillProperties
 
+class CT_PresetLineDashProperties(BaseOxmlElement):
+    """
+    Custom element class for <a:prstDash> element
+    """
+    val = OptionalAttribute('val', ST_PresetLineDashVal,
+            default=ST_PresetLineDashVal.SOLID)
 
 class CT_NonVisualDrawingProps(BaseOxmlElement):
     """
diff --git a/pptx/oxml/simpletypes.py b/pptx/oxml/simpletypes.py
index 7a4b1391f..fceabb75b 100644
--- a/pptx/oxml/simpletypes.py
+++ b/pptx/oxml/simpletypes.py
@@ -760,3 +760,22 @@ def convert_from_xml(cls, str_value):
         }[units_part]
         emu_value = Emu(int(round(quantity * multiplier)))
         return emu_value
+
+
+class ST_PresetLineDashVal(XsdToken):
+    """
+    """
+    SOLID = 'slide'
+    SYSDASH = 'sysDash'
+    SYSDOT = 'sysDot'
+    SYSDASHDOT = 'sysDashDot'
+    SYSDASHDOTDOT = 'sysDashDotDot'
+    DOT = 'dot'
+    DASH = 'dash'
+    LGDASH = 'lgDash'
+    DASHDOT = 'dashDot'
+    LGDASHDOT = 'lgDashDot'
+    LGDASHDOTDOT = 'lgDashDotDot'
+
+    _members = (SOLID, SYSDASH, SYSDASHDOT, SYSDASHDOTDOT,
+            DOT, DASH, LGDASH, DASHDOT, LGDASHDOT, LGDASHDOTDOT)