diff --git a/dlls/gdiplus/gdiplus.spec b/dlls/gdiplus/gdiplus.spec
index b1c784de949..8562f98a2f3 100644
--- a/dlls/gdiplus/gdiplus.spec
+++ b/dlls/gdiplus/gdiplus.spec
@@ -568,7 +568,7 @@
 @ stdcall GdipSetPenCustomEndCap(ptr ptr)
 @ stdcall GdipSetPenCustomStartCap(ptr ptr)
 @ stdcall GdipSetPenDashArray(ptr ptr long)
-@ stub GdipSetPenDashCap197819
+@ stdcall GdipSetPenDashCap197819(ptr long)
 @ stdcall GdipSetPenDashOffset(ptr long)
 @ stdcall GdipSetPenDashStyle(ptr long)
 @ stdcall GdipSetPenEndCap(ptr long)
diff --git a/dlls/gdiplus/pen.c b/dlls/gdiplus/pen.c
index 852494f2ac2..91d133edf37 100644
--- a/dlls/gdiplus/pen.c
+++ b/dlls/gdiplus/pen.c
@@ -357,6 +357,16 @@ GpStatus WINGDIPAPI GdipSetPenDashArray(GpPen *pen, GDIPCONST REAL *dash,
     return Ok;
 }
 
+GpStatus WINGDIPAPI GdipSetPenDashCap197819(GpPen *pen, GpDashCap dashCap)
+{
+    if(!pen)
+        return InvalidParameter;
+
+    pen->dashcap = dashCap;
+
+    return Ok;
+}
+
 /* FIXME: dash offset not used */
 GpStatus WINGDIPAPI GdipSetPenDashOffset(GpPen *pen, REAL offset)
 {
diff --git a/include/gdiplusflat.h b/include/gdiplusflat.h
index 25b6f5fcee0..76c129c19e6 100644
--- a/include/gdiplusflat.h
+++ b/include/gdiplusflat.h
@@ -41,6 +41,7 @@ GpStatus WINGDIPAPI GdipSetPenColor(GpPen*,ARGB);
 GpStatus WINGDIPAPI GdipSetPenCustomEndCap(GpPen*,GpCustomLineCap*);
 GpStatus WINGDIPAPI GdipSetPenCustomStartCap(GpPen*,GpCustomLineCap*);
 GpStatus WINGDIPAPI GdipSetPenDashArray(GpPen*,GDIPCONST REAL*,INT);
+GpStatus WINGDIPAPI GdipSetPenDashCap197819(GpPen*,GpDashCap);
 GpStatus WINGDIPAPI GdipSetPenDashOffset(GpPen*,REAL);
 GpStatus WINGDIPAPI GdipSetPenDashStyle(GpPen*,GpDashStyle);
 GpStatus WINGDIPAPI GdipSetPenEndCap(GpPen*,GpLineCap);