diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 9d7101db8..db812c0df 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -2651,7 +2651,7 @@ static void HWR_RenderPolyObjectPlane(polyobj_t *polysector, fixed_t fixedheight
 
 	if (nrPlaneVerts > UINT16_MAX) // FIXME: exceeds plVerts size
 	{
-		CONS_Debug(DBG_RENDER, "polygon size of %d exceeds max value of %d vertices\n", nrPlaneVerts, UINT16_MAX);
+		CONS_Debug(DBG_RENDER, "polygon size of %s exceeds max value of %d vertices\n", sizeu1(nrPlaneVerts), UINT16_MAX);
 		return;
 	}