diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e28cdc0..40363f2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -222,6 +222,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `internal/battery`: More accurate battery state
 ([`#2563`](https://github.com/polybar/polybar/issues/2563))
 - Some modules stop updating when system time moves backwards. ([`#857`](https://github.com/polybar/polybar/issues/857), [`#1932`](https://github.com/polybar/polybar/issues/1932))
+- Broken positioning in Openbox when the bar is hidden and shown again
+  ([`#2021`](https://github.com/polybar/polybar/issues/2021))
 
 ## [3.5.7] - 2021-09-21
 ### Fixed
diff --git a/include/x11/icccm.hpp b/include/x11/icccm.hpp
index d27bbb93..1dfa8a24 100644
--- a/include/x11/icccm.hpp
+++ b/include/x11/icccm.hpp
@@ -13,6 +13,8 @@ namespace icccm_util {
   void set_wm_name(xcb_connection_t* c, xcb_window_t w, const char* wmname, size_t l, const char* wmclass, size_t l2);
   void set_wm_protocols(xcb_connection_t* c, xcb_window_t w, vector<xcb_atom_t> flags);
   bool get_wm_urgency(xcb_connection_t* c, xcb_window_t w);
+
+  void set_wm_size_hints(xcb_connection_t* c, xcb_window_t w, int x, int y, int width, int height);
 }
 
 POLYBAR_NS_END
diff --git a/src/components/bar.cpp b/src/components/bar.cpp
index a793a8d7..72716579 100644
--- a/src/components/bar.cpp
+++ b/src/components/bar.cpp
@@ -593,6 +593,8 @@ void bar::reconfigure_wm_hints() {
 
   m_log.trace("bar: Set window _NET_WM_PID");
   ewmh_util::set_wm_pid(win);
+
+  icccm_util::set_wm_size_hints(m_connection, win, m_opts.pos.x, m_opts.pos.y, m_opts.size.w, m_opts.size.h);
 }
 
 /**
@@ -872,9 +874,6 @@ void bar::start() {
   // Notify all components that depend on the absolute bar position (such as the background manager).
   m_sig.emit(signals::ui::update_geometry{});
 
-  // Reconfigure window position after mapping (required by Openbox)
-  reconfigure_pos();
-
   m_log.trace("bar: Draw empty bar");
   m_renderer->begin(m_opts.inner_area());
   m_renderer->end();
diff --git a/src/x11/icccm.cpp b/src/x11/icccm.cpp
index a6e292ee..b4fffe39 100644
--- a/src/x11/icccm.cpp
+++ b/src/x11/icccm.cpp
@@ -38,6 +38,18 @@ namespace icccm_util {
     }
     return false;
   }
+
+  void set_wm_size_hints(xcb_connection_t* c, xcb_window_t w, int x, int y, int width, int height) {
+    xcb_size_hints_t hints;
+
+    xcb_icccm_size_hints_set_size(&hints, false, width, height);
+    xcb_icccm_size_hints_set_min_size(&hints, width, height);
+    xcb_icccm_size_hints_set_max_size(&hints, width, height);
+    xcb_icccm_size_hints_set_base_size(&hints, width, height);
+    xcb_icccm_size_hints_set_position(&hints, false, x, y);
+
+    xcb_icccm_set_wm_size_hints(c, w, XCB_ATOM_WM_NORMAL_HINTS, &hints);
+  }
 }
 
 POLYBAR_NS_END