diff --git a/include/gdiplusflat.h b/include/gdiplusflat.h
index 2504457..0903637 100644
--- a/include/gdiplusflat.h
+++ b/include/gdiplusflat.h
@@ -49,6 +49,7 @@
 GpStatus WINGDIPAPI GdipSetPenMiterLimit(GpPen*,REAL);
 GpStatus WINGDIPAPI GdipSetPenStartCap(GpPen*,GpLineCap);
 GpStatus WINGDIPAPI GdipSetPenWidth(GpPen*,REAL);
+GpStatus WINGDIPAPI GdipGetPenDashCap197819(GpPen*,GpDashCap*);
 GpStatus WINGDIPAPI GdipGetPenEndCap(GpPen*,GpLineCap*);
 GpStatus WINGDIPAPI GdipGetPenLineJoin(GpPen*,GpLineJoin*);
 GpStatus WINGDIPAPI GdipGetPenMiterLimit(GpPen*,REAL*);