diff --git a/src/core/annotation.js b/src/core/annotation.js
index f632ea108..be87b6c9b 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -2507,6 +2507,31 @@ class PolylineAnnotation extends MarkupAnnotation {
         y: rawVertices[i + 1],
       });
     }
+
+    if (!this.appearance) {
+      // The default stroke color is black.
+      const strokeColor = this.color
+        ? Array.from(this.color).map(c => c / 255)
+        : [0, 0, 0];
+
+      const borderWidth = this.borderStyle.width || 1;
+
+      this._setDefaultAppearance({
+        xref: parameters.xref,
+        extra: `${borderWidth} w`,
+        strokeColor,
+        pointsCallback: (buffer, points) => {
+          const vertices = this.data.vertices;
+          for (let i = 0, ii = vertices.length; i < ii; i++) {
+            buffer.push(
+              `${vertices[i].x} ${vertices[i].y} ${i === 0 ? "m" : "l"}`
+            );
+          }
+          buffer.push("S");
+          return [points[0].x, points[1].x, points[3].y, points[1].y];
+        },
+      });
+    }
   }
 }
 
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 2c4badc68..d3498e1c5 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -412,6 +412,7 @@
 !annotation-choice-widget.pdf
 !annotation-button-widget.pdf
 !annotation-polyline-polygon.pdf
+!annotation-polyline-polygon-without-appearance.pdf
 !zero_descent.pdf
 !operator-in-TJ-array.pdf
 !issue7878.pdf
diff --git a/test/pdfs/annotation-polyline-polygon-without-appearance.pdf b/test/pdfs/annotation-polyline-polygon-without-appearance.pdf
new file mode 100644
index 000000000..2dc953768
Binary files /dev/null and b/test/pdfs/annotation-polyline-polygon-without-appearance.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 6da2d90ee..61f33ff4d 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -4989,6 +4989,13 @@
        "type": "eq",
        "annotations": true
     },
+    {  "id": "annotation-polyline-polygon-without-appearance",
+       "file": "pdfs/annotation-polyline-polygon-without-appearance.pdf",
+       "md5": "b776937148e9f7c4de6bea552e23b92f",
+       "rounds": 1,
+       "annotations": true,
+       "type": "eq"
+    },
     {  "id": "issue4872",
        "file": "pdfs/issue4872.pdf",
        "md5": "21c6cbc682140d6f6017bbeb45892053",