diff --git a/src/core/annotation.js b/src/core/annotation.js
index 6307dd36f..a01efdd9b 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -4397,14 +4397,20 @@ class InkAnnotation extends MarkupAnnotation {
       buffer.push(
         `${numberToString(bezier[0])} ${numberToString(bezier[1])} m`
       );
-      for (let i = 2, ii = bezier.length; i < ii; i += 6) {
-        const curve = bezier
-          .slice(i, i + 6)
-          .map(numberToString)
-          .join(" ");
-        buffer.push(`${curve} c`);
+      if (bezier.length === 2) {
+        buffer.push(
+          `${numberToString(bezier[0])} ${numberToString(bezier[1])} l S`
+        );
+      } else {
+        for (let i = 2, ii = bezier.length; i < ii; i += 6) {
+          const curve = bezier
+            .slice(i, i + 6)
+            .map(numberToString)
+            .join(" ");
+          buffer.push(`${curve} c`);
+        }
+        buffer.push("S");
       }
-      buffer.push("S");
       appearanceBuffer.push(buffer.join("\n"));
     }
     const appearance = appearanceBuffer.join("\n");
diff --git a/src/display/editor/ink.js b/src/display/editor/ink.js
index dea3e7fb4..24a0a07c4 100644
--- a/src/display/editor/ink.js
+++ b/src/display/editor/ink.js
@@ -628,7 +628,7 @@ class InkEditor extends AnnotationEditor {
 
     this.parent.addInkEditorIfNeeded(/* isCommitting = */ true);
 
-    // When commiting, the position of this editor is changed, hence we must
+    // When committing, the position of this editor is changed, hence we must
     // move it to the right position in the DOM.
     this.moveInDOM();
     this.div.focus({
@@ -994,6 +994,14 @@ class InkEditor extends AnnotationEditor {
       const points = [];
       for (let j = 0, jj = bezier.length; j < jj; j++) {
         const [first, control1, control2, second] = bezier[j];
+        if (first[0] === second[0] && first[1] === second[1] && jj === 1) {
+          // We have only one point.
+          const p0 = s * first[0] + shiftX;
+          const p1 = s * first[1] + shiftY;
+          buffer.push(p0, p1);
+          points.push(p0, p1);
+          break;
+        }
         const p10 = s * first[0] + shiftX;
         const p11 = s * first[1] + shiftY;
         const p20 = s * control1[0] + shiftX;
diff --git a/test/test_manifest.json b/test/test_manifest.json
index aece61a10..0a0f3c4d0 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -8458,5 +8458,43 @@
             "structTreeParentId": null
          }
       }
+   },
+   {
+      "id": "issue17418",
+      "file": "pdfs/empty.pdf",
+      "md5": "2bfd06746bd5c2e6fc3492c83c152bc5",
+      "rounds": 1,
+      "type": "eq",
+      "save": true,
+      "print": true,
+      "annotationStorage": {
+         "pdfjs_internal_editor_0": {
+            "annotationType": 15,
+            "color": [ 53, 228, 47 ],
+            "thickness": 20,
+            "opacity": 1,
+            "paths": [
+               {
+                  "bezier": [
+                     279.9183673469388,
+                     477.0105263157895
+                  ],
+                  "points": [
+                     279.9183673469388,
+                     477.0105263157895
+                  ]
+               }
+            ],
+            "pageIndex": 0,
+            "rect": [
+               269.9183673469388,
+               443.93684210526317,
+               312.9387755102041,
+               487.0105263157895
+            ],
+            "rotation": 0,
+            "structTreeParentId": null
+         }
+      }
    }
 ]