diff --git a/antlr3c.changes b/antlr3c.changes
index 35f32ea..66476b3 100644
--- a/antlr3c.changes
+++ b/antlr3c.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Feb 20 10:54:07 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Use %autosetup macro. Allows to eliminate the usage of deprecated
+  %patchN.
+
 -------------------------------------------------------------------
 Thu Jun 16 07:23:25 UTC 2016 - jslaby@suse.com
 
diff --git a/antlr3c.spec b/antlr3c.spec
index 0ae9b89..63c0b25 100644
--- a/antlr3c.spec
+++ b/antlr3c.spec
@@ -72,11 +72,7 @@ This package contains header files and development libraries needed to
 develop programs using the antlr3c library.
 
 %prep
-%setup -q -n lib%{name}-%{version}
-%patch0 -p1
-%patch1 -p1
-%patch2 -p1
-%patch3 -p1
+%autosetup -p1 -n lib%{name}-%{version}
 
 %build
 autoreconf -fiv