diff --git a/include/render.h b/include/render.h
index 2b2c8dad..03751c01 100644
--- a/include/render.h
+++ b/include/render.h
@@ -40,7 +40,7 @@ typedef struct render_params {
  * updated in X11.
  *
  */
-void render_con(Con *con, bool render_fullscreen);
+void render_con(Con *con);
 
 /**
  * Returns the height for the decorations
diff --git a/src/commands.c b/src/commands.c
index ee402846..ed5e482d 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -831,7 +831,7 @@ void cmd_append_layout(I3_CMD, const char *cpath) {
     // is not executed yet and will be batched with append_layout’s
     // needs_tree_render after the parser finished. We should check if that is
     // necessary at all.
-    render_con(croot, false);
+    render_con(croot);
 
     restore_open_placeholder_windows(parent);
 
diff --git a/src/floating.c b/src/floating.c
index 4f2760a7..c8b436b4 100644
--- a/src/floating.c
+++ b/src/floating.c
@@ -412,8 +412,7 @@ void floating_enable(Con *con, bool automatic) {
     DLOG("Corrected y = %d (deco_height = %d)\n", nc->rect.y, deco_height);
 
     /* render the cons to get initial window_rect correct */
-    render_con(nc, false);
-    render_con(con, false);
+    render_con(nc);
 
     if (set_focus)
         con_activate(con);
@@ -568,7 +567,7 @@ DRAGGING_CB(drag_window_callback) {
     con->rect.x = old_rect->x + (new_x - event->root_x);
     con->rect.y = old_rect->y + (new_y - event->root_y);
 
-    render_con(con, false);
+    render_con(con);
     x_push_node(con);
     xcb_flush(conn);
 
diff --git a/src/manage.c b/src/manage.c
index c222d351..63cadc0c 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -569,13 +569,13 @@ void manage_window(xcb_window_t window, xcb_get_window_attributes_cookie_t cooki
          * workspace at all. However, just calling render_con() on the
          * workspace isn’t enough either — it needs the rect. */
         ws->rect = ws->parent->rect;
-        render_con(ws, true);
+        render_con(ws);
         /* Disable setting focus, otherwise we’d move focus to an invisible
          * workspace, which we generally prevent (e.g. in
          * con_move_to_workspace). */
         set_focus = false;
     }
-    render_con(croot, false);
+    render_con(croot);
 
     /* Send an event about window creation */
     ipc_send_window_event("new", nc);
diff --git a/src/render.c b/src/render.c
index 518d436b..e9e38ae0 100644
--- a/src/render.c
+++ b/src/render.c
@@ -37,16 +37,15 @@ int render_deco_height(void) {
  * updated in X11.
  *
  */
-void render_con(Con *con, bool render_fullscreen) {
+void render_con(Con *con) {
     render_params params = {
         .rect = con->rect,
         .x = con->rect.x,
         .y = con->rect.y,
         .children = con_num_children(con)};
 
-    DLOG("Rendering %snode %p / %s / layout %d / children %d\n",
-         (render_fullscreen ? "fullscreen " : ""), con, con->name, con->layout,
-         params.children);
+    DLOG("Rendering node %p / %s / layout %d / children %d\n", con, con->name,
+         con->layout, params.children);
 
     int i = 0;
     con->mapped = true;
@@ -57,8 +56,9 @@ void render_con(Con *con, bool render_fullscreen) {
          * needs to be smaller */
         Rect *inset = &(con->window_rect);
         *inset = (Rect){0, 0, con->rect.width, con->rect.height};
-        if (!render_fullscreen)
+        if (con->fullscreen_mode == CF_NONE) {
             *inset = rect_add(*inset, con_border_style_rect(con));
+        }
 
         /* Obey x11 border */
         inset->width -= (2 * con->border_width);
@@ -81,7 +81,7 @@ void render_con(Con *con, bool render_fullscreen) {
     if (fullscreen) {
         fullscreen->rect = params.rect;
         x_raise_con(fullscreen);
-        render_con(fullscreen, true);
+        render_con(fullscreen);
         /* Fullscreen containers are either global (underneath the CT_ROOT
          * container) or per-output (underneath the CT_CONTENT container). For
          * global fullscreen containers, we cannot abort rendering here yet,
@@ -124,7 +124,7 @@ void render_con(Con *con, bool render_fullscreen) {
             DLOG("child at (%d, %d) with (%d x %d)\n",
                  child->rect.x, child->rect.y, child->rect.width, child->rect.height);
             x_raise_con(child);
-            render_con(child, false);
+            render_con(child);
             i++;
         }
 
@@ -137,7 +137,7 @@ void render_con(Con *con, bool render_fullscreen) {
              * that we have a non-leaf-container inside the stack. In that
              * case, the children of the non-leaf-container need to be raised
              * as well. */
-                render_con(child, false);
+                render_con(child);
             }
 
             if (params.children != 1)
@@ -186,7 +186,7 @@ static void render_root(Con *con, Con *fullscreen) {
     Con *output;
     if (!fullscreen) {
         TAILQ_FOREACH(output, &(con->nodes_head), nodes) {
-            render_con(output, false);
+            render_con(output);
         }
     }
 
@@ -252,7 +252,7 @@ static void render_root(Con *con, Con *fullscreen) {
             DLOG("floating child at (%d,%d) with %d x %d\n",
                  child->rect.x, child->rect.y, child->rect.width, child->rect.height);
             x_raise_con(child);
-            render_con(child, false);
+            render_con(child);
         }
     }
 }
@@ -302,7 +302,7 @@ static void render_output(Con *con) {
     if (fullscreen) {
         fullscreen->rect = con->rect;
         x_raise_con(fullscreen);
-        render_con(fullscreen, true);
+        render_con(fullscreen);
         return;
     }
 
@@ -342,7 +342,7 @@ static void render_output(Con *con) {
         DLOG("child at (%d, %d) with (%d x %d)\n",
              child->rect.x, child->rect.y, child->rect.width, child->rect.height);
         x_raise_con(child);
-        render_con(child, false);
+        render_con(child);
     }
 }
 
diff --git a/src/tree.c b/src/tree.c
index e3849873..99b03619 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -453,7 +453,7 @@ void tree_render(void) {
     mark_unmapped(croot);
     croot->mapped = true;
 
-    render_con(croot, false);
+    render_con(croot);
 
     x_push_changes(croot);
     DLOG("-- END RENDERING --\n");