diff --git a/bedstead.c b/bedstead.c
index 459ec2c..1595431 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -3870,6 +3870,14 @@ emit_hints(int vstems[XSIZE], int ledges[XSIZE], int redges[XSIZE],
 			start = i * YPIX_S;
 			size = YPIX_S;
 			break;
+		case hint_aedge: /* Top edge. */
+			start = (i + 1) * YPIX_S;
+			size = -20;
+			break;
+		case hint_zedge: /* Bottom edge. */
+			start = i * YPIX_S + 21;
+			size = -21;
+			break;
 		default: continue;
 		}
 		printf(" %g %g",
@@ -3889,6 +3897,14 @@ emit_hints(int vstems[XSIZE], int ledges[XSIZE], int redges[XSIZE],
 			start = i * XPIX_S - weight->weight;
 			size = XPIX_S + weight->weight;
 			break;
+		case hint_aedge: /* Left edge. */
+			start = i * YPIX_S + 21;
+			size = -21;
+			break;
+		case hint_zedge: /* Right edge. */
+			start = (i + 1) * YPIX_S;
+			size = -20;
+			break;
 		default: continue;
 		}
 		printf(" %g %g",