diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
index 27581e7e3..0afa8dacc 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
@@ -1305,6 +1305,15 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         // SY -->
         binding.abovePageText.text = currentPage
         binding.belowPageText.text = "${pages.size}"
+
+        if (hasExtraPage) {
+            binding.pageSlider.stepSize = 2f
+            binding.pageSliderVert.stepSize = 2f
+            if (binding.pageSliderVert.valueTo.toInt() % 2 == 1) {
+                binding.pageSlider.valueTo = binding.pageSlider.valueTo - 1
+                binding.pageSliderVert.valueTo = binding.pageSliderVert.valueTo - 1
+            }
+        }
         // SY <--
     }