diff --git a/python-fastparquet.changes b/python-fastparquet.changes
index 3a27d20..630ae16 100644
--- a/python-fastparquet.changes
+++ b/python-fastparquet.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Feb  4 17:50:32 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
+
+- Use of "+=" in %check warrants bash as buildshell.
+
 -------------------------------------------------------------------
 Wed Feb  3 21:43:10 UTC 2021 - Ben Greiner <code@bnavigator.de>
 
diff --git a/python-fastparquet.spec b/python-fastparquet.spec
index 511aa38..575aae7 100644
--- a/python-fastparquet.spec
+++ b/python-fastparquet.spec
@@ -16,6 +16,7 @@
 #
 
 
+%define _buildshell /bin/bash
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 %define         skip_python2 1
 Name:           python-fastparquet