diff --git a/src/core/annotation.js b/src/core/annotation.js
index c77b2b8c96fba..9f27194994349 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -2526,12 +2526,13 @@ class WidgetAnnotation extends Annotation {
       const roundWithTwoDigits = x => Math.floor(x * 100) / 100;
 
       if (lineCount === -1) {
+        // Get the text width for a font size of 1.
         const textWidth = this._getTextWidth(text, font);
+
+        // width / textWidth is the max font size to fit the width.
+        // height / LINE_FACTOR is the max font size to fit the height.
         fontSize = roundWithTwoDigits(
-          Math.min(
-            height / LINE_FACTOR,
-            textWidth > width ? width / textWidth : Infinity
-          )
+          Math.min(height / LINE_FACTOR, width / textWidth)
         );
         numberOfLines = 1;
       } else {
diff --git a/test/unit/annotation_spec.js b/test/unit/annotation_spec.js
index 8f91754741270..9e5739fd73f88 100644
--- a/test/unit/annotation_spec.js
+++ b/test/unit/annotation_spec.js
@@ -1850,7 +1850,7 @@ describe("annotation", function () {
       const utf16String =
         "\x30\x53\x30\x93\x30\x6b\x30\x61\x30\x6f\x4e\x16\x75\x4c\x30\x6e";
       expect(appearance).toEqual(
-        "/Tx BMC q BT /Goth 5.92 Tf 0 g 1 0 0 1 0 0 Tm" +
+        "/Tx BMC q BT /Goth 3.5 Tf 0 g 1 0 0 1 0 0 Tm" +
           ` 2 3.07 Td (${utf16String}) Tj ET Q EMC`
       );
     });