From fb004f8bc610b0cf52342d35314a9e0a0434e745 Mon Sep 17 00:00:00 2001
From: Eric Wieser <wieser.eric@gmail.com>
Date: Tue, 1 Aug 2017 17:40:56 +0000
Subject: MAINT: Stop using the undocumented coercion-then-downcast feature of
 subdtype

---
 numpy/core/function_base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'numpy/core/function_base.py')

diff --git a/numpy/core/function_base.py b/numpy/core/function_base.py
index 7098b8b91..0415e16ac 100644
--- a/numpy/core/function_base.py
+++ b/numpy/core/function_base.py
@@ -339,7 +339,7 @@ def geomspace(start, stop, num=50, endpoint=True, dtype=None):
     # complex and another is negative and log would produce NaN otherwise
     start = start + (stop - stop)
     stop = stop + (start - start)
-    if _nx.issubdtype(dtype, complex):
+    if _nx.issubdtype(dtype, _nx.complexfloating):
         start = start + 0j
         stop = stop + 0j
 
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