diff --git a/lib/matplotlib/axes/_secondary_axes.py b/lib/matplotlib/axes/_secondary_axes.py
index 3cbe8e0f1ff1..b5b4598439c6 100644
--- a/lib/matplotlib/axes/_secondary_axes.py
+++ b/lib/matplotlib/axes/_secondary_axes.py
@@ -43,11 +43,12 @@ def _make_secondary_locator(rect, parent):
*parent*.
"""
_rect = mtransforms.Bbox.from_bounds(*rect)
- bb = mtransforms.TransformedBbox(_rect, parent.transAxes)
- tr = parent.figure.transFigure.inverted()
- bb = mtransforms.TransformedBbox(bb, tr)
-
def secondary_locator(ax, renderer):
+ # delay evaluating transform until draw time because the
+ # parent transform may have changed (i.e. if window reesized)
+ bb = mtransforms.TransformedBbox(_rect, parent.transAxes)
+ tr = parent.figure.transFigure.inverted()
+ bb = mtransforms.TransformedBbox(bb, tr)
return bb
return secondary_locator
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 1a848692907e..7ef48bbd2ee2 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -6106,3 +6106,16 @@ def test_secondary_fail():
axsec = ax.secondary_xaxis('right')
with pytest.raises(ValueError):
axsec = ax.secondary_yaxis('bottom')
+
+
+def test_secondary_resize():
+ fig, ax = plt.subplots(figsize=(10, 5))
+ ax.plot(np.arange(2, 11), np.arange(2, 11))
+ def invert(x):
+ with np.errstate(divide='ignore'):
+ return 1 / x
+
+ axsec = ax.secondary_xaxis('top', functions=(invert, invert))
+ fig.canvas.draw()
+ fig.set_size_inches((7, 4))
+ assert_allclose(ax.get_position().extents, [0.125, 0.1, 0.9, 0.9])
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