diff --git a/csindex.changes b/csindex.changes
index 65c7cb9..5fe6dc4 100644
--- a/csindex.changes
+++ b/csindex.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Feb 26 11:06:50 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Use %autosetup macro. Allows to eliminate the usage of deprecated
+  PatchN.
+
 -------------------------------------------------------------------
 Mon Nov  6 15:56:16 UTC 2023 - Dominique Leuenberger <dimstar@opensuse.org>
 
diff --git a/csindex.spec b/csindex.spec
index f9d2f0a..c568242 100644
--- a/csindex.spec
+++ b/csindex.spec
@@ -34,9 +34,9 @@ Usage: csindex -z il2 file.idx Creates file.ind - a sorted index file.
 Uses the ISO 8859-2 encoding.
 
 %prep
-%setup
+%autosetup -p0
+
 install -m 644 %{SOURCE1} .
-%patch0
 
 %build
 make CC="gcc $RPM_OPT_FLAGS" %{?_smp_mflags}