diff --git a/fb/fbbits.h b/fb/fbbits.h
index c7bd2c88dd..91768ac1b8 100644
--- a/fb/fbbits.h
+++ b/fb/fbbits.h
@@ -716,7 +716,7 @@ POLYLINE(DrawablePtr pDrawable,
                 }
                 e = -len;
                 e1 <<= 1;
-                e3 = e << 1;
+                e3 = e * 2;
                 FIXUP_ERROR(e, octant, bias);
                 if (and == 0) {
                     while (len--) {
@@ -875,7 +875,7 @@ POLYSEGMENT(DrawablePtr pDrawable, GCPtr pGC, int nseg, xSegment * pseg)
                 }
                 e = -len;
                 e1 <<= 1;
-                e3 = e << 1;
+                e3 = e * 2;
                 FIXUP_ERROR(e, octant, bias);
                 if (!capNotLast)
                     len++;