diff --git a/src/libtess2/Source/sweep.c b/src/libtess2/Source/sweep.c
index 112f1ef5..6a927745 100755
--- a/src/libtess2/Source/sweep.c
+++ b/src/libtess2/Source/sweep.c
@@ -1122,11 +1122,12 @@ static void InitEdgeDict( TESStesselator *tess )
 	h = (tess->bmax[1] - tess->bmin[1]);
 
         /* 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);
+           slightly enlarging it. To avoid floating point precision issues, 
+        make sure to enlarge by a minimal amount. */
+	smin = tess->bmin[0] - (w > 0.01 ? w : 0.01);
+	smax = tess->bmax[0] + (w > 0.01 ? w : 0.01);
+	tmin = tess->bmin[1] - (h > 0.01 ? h : 0.01);
+	tmax = tess->bmax[1] + (h > 0.01 ? h : 0.01);
 
 	AddSentinel( tess, smin, smax, tmin );
 	AddSentinel( tess, smin, smax, tmax );