diff --git a/service.js b/service.js
index a7e05af..71646a7 100644
--- a/service.js
+++ b/service.js
@@ -419,6 +419,13 @@ class BesService {
               const x = match.highlights[0].left
               const y = match.highlights[0].bottom
               this.drawMissingComma(x, y, scale)
+            } else if (toInsert === '.') {
+              // Thou we should draw . after the word before match.match.offset, if there is a line break inbetween,
+              // the correction markup would be drawn in one line and the highlight rectangle for onClick would reside
+              // in another line, making a confusing UX.
+              const x = match.highlights[0].left
+              const y = match.highlights[0].bottom - 4 * scale
+              this.drawMissingPeriod(x, y, scale)
             } else if (/^\s+$/.test(toInsert)) {
               const x = match.highlights[0].left
               const y1 = match.highlights[0].bottom - 2 * scale
@@ -447,6 +454,10 @@ class BesService {
               const x = match.highlights.at(-1).right
               const y = match.highlights.at(-1).bottom
               this.drawMissingComma(x, y, scale)
+            } else if (toInsert === '.') {
+              const x = match.highlights.at(-1).right + 3 * scale
+              const y = match.highlights.at(-1).bottom - 4 * scale
+              this.drawMissingPeriod(x, y, scale)
             } else if (/^\s+$/.test(toInsert)) {
               const x = match.highlights.at(-1).right
               const y1 = match.highlights.at(-1).bottom - 2 * scale
@@ -702,6 +713,28 @@ class BesService {
     }
   }
 
+  /**
+   * Draws the missing period sign
+   *
+   * @param {Number} x Sign center [px]
+   * @param {Number} y Sign bottom [px]
+   * @param {Number} scale Sign scale
+   */
+  drawMissingPeriod(x, y, scale) {
+    const dpr = window.devicePixelRatio
+    this.ctx.beginPath()
+    this.ctx.ellipse(
+      x * dpr,
+      y * dpr,
+      2 * scale * dpr,
+      2 * scale * dpr,
+      0,
+      0,
+      2 * Math.PI
+    )
+    this.ctx.fill()
+  }
+
   /**
    * Draws the wrong spacing sign. Control direction of chevrons by reversing y1 and y2.
    *