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-rw-r--r--src/viewport.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/viewport.cpp b/src/viewport.cpp
index 0c510693e..e881edf64 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -1287,6 +1287,8 @@ static void ViewportAddWaypoints(DrawPixelInfo *dpi)
*/
void ViewportSign::UpdatePosition(int center, int top, StringID str)
{
+ if (this->width_normal != 0) this->MarkDirty();
+
this->top = top;
char buffer[DRAW_STRING_BUFFER];
@@ -1299,6 +1301,8 @@ void ViewportSign::UpdatePosition(int center, int top, StringID str)
_cur_fontsize = FS_SMALL;
this->width_small = GetStringBoundingBox(buffer).width + 3;
_cur_fontsize = FS_NORMAL;
+
+ this->MarkDirty();
}
/**