diff --git a/include/floating.h b/include/floating.h
index babfafc9..4382437b 100644
--- a/include/floating.h
+++ b/include/floating.h
@@ -143,7 +143,7 @@ drag_result_t drag_pointer(Con *con, const xcb_button_press_event_t *event,
  * outputs.
  *
  */
-void floating_reposition(Con *con, Rect newrect);
+bool floating_reposition(Con *con, Rect newrect);
 
 /**
  * Sets size of the CT_FLOATING_CON to specified dimensions. Might limit the
diff --git a/src/commands.c b/src/commands.c
index b62daad9..98625a91 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -1718,10 +1718,12 @@ void cmd_move_window_to_position(I3_CMD, long x, long y) {
         newrect.x = x;
         newrect.y = y;
 
-        floating_reposition(current->con->parent, newrect);
+        if (!floating_reposition(current->con->parent, newrect)) {
+            yerror("Cannot move window/container out of bounds.");
+            has_error = true;
+        }
     }
 
-    // XXX: default reply for now, make this a better reply
     if (!has_error)
         ysuccess(true);
 }
diff --git a/src/floating.c b/src/floating.c
index e958153d..2130d673 100644
--- a/src/floating.c
+++ b/src/floating.c
@@ -864,12 +864,12 @@ drag_result_t drag_pointer(Con *con, const xcb_button_press_event_t *event, xcb_
  * outputs.
  *
  */
-void floating_reposition(Con *con, Rect newrect) {
+bool floating_reposition(Con *con, Rect newrect) {
     /* Sanity check: Are the new coordinates on any output? If not, we
      * ignore that request. */
     if (!contained_by_output(newrect)) {
         ELOG("No output found at destination coordinates. Not repositioning.\n");
-        return;
+        return false;
     }
 
     con->rect = newrect;
@@ -881,6 +881,7 @@ void floating_reposition(Con *con, Rect newrect) {
         con->scratchpad_state = SCRATCHPAD_CHANGED;
 
     tree_render();
+    return true;
 }
 
 /*