diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77dfd05f..98e39afd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - (**Reader**) Fix the reader transition page previous chapter scanlator name showing the chapter name instead of the scanlator name
 - (**Reader**) Fix opening the previous/next chapter in the continuous horizontal mode with inverted reading direction
 - (**Reader**) Fix scroll preservation in continuous horizontal mode with righ to left reading direction
+- (**Reader**) Fix mobile progress bar previous/next button not being clickable in single page chapters
 - (**Manga**) Fix dynamic manga page color theme not getting reset after leaving the manga page
 
 ## [20251230.01] (r2937) - 2025-12-30
diff --git a/src/features/reader/overlay/progress-bar/components/ReaderProgressBarCurrentPageSlot.tsx b/src/features/reader/overlay/progress-bar/components/ReaderProgressBarCurrentPageSlot.tsx
index 24e18125..7e0096ea 100644
--- a/src/features/reader/overlay/progress-bar/components/ReaderProgressBarCurrentPageSlot.tsx
+++ b/src/features/reader/overlay/progress-bar/components/ReaderProgressBarCurrentPageSlot.tsx
@@ -37,14 +37,14 @@ export const ReaderProgressBarCurrentPageSlot = ({
                 position: 'absolute',
                 cursor: isDragging ? 'grabbing' : 'grab',
                 ...applyStyles(getProgressBarPositionInfo(progressBarPosition).isHorizontal, {
-                    left: `${(Math.max(0, currentPagesIndex - 1) / (pagesLength - 1)) * 100}%`,
-                    width: `calc(100% / ${pagesLength - 1})`,
+                    left: `${(Math.max(0, currentPagesIndex - 1) / pagesLength) * 100}%`,
+                    width: `calc(100% / ${pagesLength})`,
                     height: '100%',
                 }),
                 ...applyStyles(getProgressBarPositionInfo(progressBarPosition).isVertical, {
-                    top: `${(Math.max(0, currentPagesIndex - 1) / (pagesLength - 1)) * 100}%`,
+                    top: `${(Math.max(0, currentPagesIndex - 1) / pagesLength) * 100}%`,
                     width: '100%',
-                    height: `calc(100% / ${pagesLength - 1})`,
+                    height: `calc(100% / ${pagesLength})`,
                 }),
                 ...boxProps?.sx,
             }}