diff --git a/modules/imgproc/src/drawing.cpp b/modules/imgproc/src/drawing.cpp
index 8214b17013..fcac9ff303 100644
--- a/modules/imgproc/src/drawing.cpp
+++ b/modules/imgproc/src/drawing.cpp
@@ -1667,7 +1667,7 @@ ThickLine( Mat& img, Point2l p0, Point2l p1, const void* color,
     {
         if( line_type < cv::LINE_AA )
         {
-            if( line_type == 1 || line_type == 4 || shift == 0 )
+            if( line_type == 1 || line_type == 8 || shift == 0 )
             {
                 p0.x = (p0.x + (XY_ONE>>1)) >> XY_SHIFT;
                 p0.y = (p0.y + (XY_ONE>>1)) >> XY_SHIFT;