diff --git a/autoconf-2_72.diff b/autoconf-2_72.diff
new file mode 100644
index 0000000..1d3e745
--- /dev/null
+++ b/autoconf-2_72.diff
@@ -0,0 +1,21 @@
+From: Jan Engelhardt <jengelh@inai.de>
+Date: 2023-12-26 15:16:01.213214373 +0100
+
+wxWidgets stupidly uses $EGREP near the end of configure.in without ever setting it.
+
+---
+ configure.in |    1 +
+ 1 file changed, 1 insertion(+)
+
+Index: wxWidgets-3.2.4/configure.in
+===================================================================
+--- wxWidgets-3.2.4.orig/configure.in
++++ wxWidgets-3.2.4/configure.in
+@@ -8712,6 +8712,7 @@ dnl MAKE_SET will be replaced with "MAKE
+ dnl itself (this macro is required if SUBDIRS variable is used in Makefile.am
+ dnl - and we do use it)
+ AC_PROG_MAKE_SET
++AC_PROG_EGREP
+ 
+ 
+ AC_CONFIG_HEADERS([lib/wx/include/${TOOLCHAIN_FULLNAME}/wx/setup.h:setup.h.in])
diff --git a/wxWidgets-3_2.changes b/wxWidgets-3_2.changes
index f47ebf1..6ce475c 100644
--- a/wxWidgets-3_2.changes
+++ b/wxWidgets-3_2.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Dec 26 14:28:08 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- Add autoconf-2_72.diff
+
 -------------------------------------------------------------------
 Sat Nov 11 17:38:28 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/wxWidgets-3_2.spec b/wxWidgets-3_2.spec
index 956cd76..aecd214 100644
--- a/wxWidgets-3_2.spec
+++ b/wxWidgets-3_2.spec
@@ -82,6 +82,7 @@ Source5:        wxWidgets-3_2-rpmlintrc
 # identify and backport wxPython fixes to wxWidgets.
 Source6:        wxpython-mkdiff.sh
 Patch1:         soversion.diff
+Patch2:         autoconf-2_72.diff
 %if "%{flavor}" == "doc"
 BuildRequires:  doxygen
 BuildRequires:  fdupes