diff --git a/src/lib/aqdiagram/draw/context_cairo.c b/src/lib/aqdiagram/draw/context_cairo.c
index 4f82bdc..0eec12f 100644
--- a/src/lib/aqdiagram/draw/context_cairo.c
+++ b/src/lib/aqdiagram/draw/context_cairo.c
@@ -257,6 +257,7 @@ int _penCreate(AQDG_DRAW_CONTEXT *g, uint32_t frontColour, int lineWidth, int da
   AQDG_Draw_Pen_SetDashType(pen, dashType);
 
   AQDG_Draw_Pen_List_Add(pen, xg->penList);
+  DBG_ERROR(NULL, "Created pen %d", xg->lastPenId);
   return xg->lastPenId;
 }