diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 68c4096d0..82c81a6ff 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -43,6 +43,9 @@ Breaking Changes:
 
 Other Changes:
 
+- Scrollbar: fixed a codepath leading to a divide-by-zero (which would not be
+  noticeable by user but detected by sanitizers). (#9089) [@judicaelclair]
+
 
 -----------------------------------------------------------------------
  VERSION 1.92.5 (Released 2025-11-20)
diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp
index a4b3e7ed1..9009bbc8c 100644
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@@ -1037,6 +1037,8 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, ImS6
 
     // V denote the main, longer axis of the scrollbar (= height for a vertical scrollbar)
     const float scrollbar_size_v = (axis == ImGuiAxis_X) ? bb.GetWidth() : bb.GetHeight();
+    if (scrollbar_size_v < 1.0f)
+        return false;
 
     // Calculate the height of our grabbable box. It generally represent the amount visible (vs the total scrollable amount)
     // But we maintain a minimum size in pixel to allow for the user to still aim inside.