diff --git a/src/render.cpp b/src/render.cpp
index ecbdc0b..ae11026 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -91,7 +91,7 @@ void mem_edit_interact_fn(const u8 *, u64 off, void *user_data)
 {
   App_State *app = reinterpret_cast<App_State *>(user_data);
   off += app->base_display_addr;
-  app->viewer.hovered_off = off;
+  app->viewer.hovered_off = off + 1;
 }
 
 internal
@@ -232,6 +232,8 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
 
       ImGui::TableNextColumn();
 
+      app.viewer.hovered_off = 0;
+
       assert(app.base_display_addr < app.inspected_file.size);
       void *content = app.inspected_file.mem + app.base_display_addr;
       u64 content_size = app.inspected_file.size - app.base_display_addr;
@@ -329,9 +331,10 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
       // ---------------------------------
       ImGui::Separator();
 
+      if (app.viewer.hovered_off)
       {
-        Section hovered_section = find_section(app, app.viewer.hovered_off);
-        Sec_Hover_Info hover_info = get_section_hover_info(scratch.arena, hovered_section, app.viewer.hovered_off, app.inspected_file.mem);
+        Section hovered_section = find_section(app, app.viewer.hovered_off - 1);
+        Sec_Hover_Info hover_info = get_section_hover_info(scratch.arena, hovered_section, app.viewer.hovered_off - 1, app.inspected_file.mem);
         u8 indent = 0;
         for (String8_Node *node = hover_info.desc; node; node = node->next) {
           String8 fmt = str8("%s");
@@ -344,6 +347,8 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
           indent += 2;
         }
         app.viewer.hovered_range = hover_info.rng;
+      } else {
+        app.viewer.hovered_range = {};
       }
 
       ImGui::EndTable();
diff --git a/src/render.h b/src/render.h
index 3aa8599..93d2f9a 100644
--- a/src/render.h
+++ b/src/render.h
@@ -19,6 +19,7 @@ struct Viewer {
   u64 latest_page_list_gone_to;
 
   // Absolute byte offset into inspected_file.mem that has been hovered last.
+  // 0 means "invalid", otherwise the actual offset is `hovered_off - 1`.
   u64 hovered_off;
   Byte_Range hovered_range;
 };