diff --git a/Source/sweep.c b/Source/sweep.c
index 4f3c53e..32a56bf 100755
--- a/Source/sweep.c
+++ b/Source/sweep.c
@@ -1118,15 +1118,14 @@ static void InitEdgeDict( TESStesselator *tess )
 	tess->dict = dictNewDict( &tess->alloc, tess, (int (*)(void *, DictKey, DictKey)) EdgeLeq );
 	if (tess->dict == NULL) longjmp(tess->env,1);
 
-	w = (tess->bmax[0] - tess->bmin[0]);
-	h = (tess->bmax[1] - tess->bmin[1]);
+	/* If the bbox is empty, ensure that sentinels are not coincident by slightly enlarging it. */
+	w = (tess->bmax[0] - tess->bmin[0]) + (TESSreal)0.01;
+	h = (tess->bmax[1] - tess->bmin[1]) + (TESSreal)0.01;
 
-        /* If the bbox is empty, ensure that sentinels are not coincident by
-           slightly enlarging it. */
-	smin = tess->bmin[0] - (w > 0 ? w : 0.01);
-        smax = tess->bmax[0] + (w > 0 ? w : 0.01);
-        tmin = tess->bmin[1] - (h > 0 ? h : 0.01);
-        tmax = tess->bmax[1] + (h > 0 ? h : 0.01);
+	smin = tess->bmin[0] - w;
+    smax = tess->bmax[0] + w;
+    tmin = tess->bmin[1] - h;
+    tmax = tess->bmax[1] + h;
 
 	AddSentinel( tess, smin, smax, tmin );
 	AddSentinel( tess, smin, smax, tmax );