diff --git a/cdargs-1.35_configure_c99.patch b/cdargs-1.35_configure_c99.patch
new file mode 100644
index 0000000..d20718f
--- /dev/null
+++ b/cdargs-1.35_configure_c99.patch
@@ -0,0 +1,15 @@
+diff --git a/configure b/configure
+index 8567554..f4588d4 100755
+--- a/configure
++++ b/configure
+@@ -2507,8 +2507,8 @@ main ()
+   for (i = 0; i < 256; i++)
+     if (XOR (islower (i), ISLOWER (i))
+         || toupper (i) != TOUPPER (i))
+-      exit(2);
+-  exit (0);
++      return 2;
++  return 0;
+ }
+ _ACEOF
+ rm -f conftest$ac_exeext
diff --git a/cdargs.spec b/cdargs.spec
index 340e367..12b572a 100644
--- a/cdargs.spec
+++ b/cdargs.spec
@@ -4,7 +4,8 @@ Name:       cdargs
 Version:    1.35
 Release:    %autorelease
 Summary:    The shell cd with bookmarks and browser
-License:    GPLv2+
+# Automatically converted from old format: GPLv2+ - review is highly recommended.
+License:    GPL-2.0-or-later
 URL:        http://www.skamphausen.de/cgi-bin/ska/CDargs/
 Source0:    http://www.skamphausen.de/downloads/cdargs/%{name}-%{version}.tar.gz
 Source1:    %{name}-%{version}_emacs-init.el
@@ -12,6 +13,7 @@ Source1:    %{name}-%{version}_emacs-init.el
 Patch0:     %{name}-%{version}_shebangs.patch
 Patch1:     %{name}-%{version}_format_security.patch
 Patch2:     %{name}-%{version}_fix_fsf_address.patch
+Patch3:     %{name}-%{version}_configure_c99.patch
 
 BuildRequires:    gcc-c++
 BuildRequires:    ncurses-devel