diff --git a/doxygen-obsolete-egrep.patch b/doxygen-obsolete-egrep.patch
new file mode 100644
index 0000000..9a859b5
--- /dev/null
+++ b/doxygen-obsolete-egrep.patch
@@ -0,0 +1,40 @@
+--- doxygen-1.9.6.orig/templates/latex/latexmakefile.tpl	2023-03-09 10:29:08.772377871 +0100
++++ doxygen-1.9.6/templates/latex/latexmakefile.tpl	2023-03-09 10:29:23.754555476 +0100
+@@ -9,7 +9,7 @@
+ {# TODO: generateBib #}
+ 	pdflatex refman
+ 	latex_count=8 ; \
+-	while egrep -s 'Rerun (LaTeX|to get cross-references right)' refman.log && [ $$latex_count -gt 0 ] ;\
++	while grep -E -s 'Rerun (LaTeX|to get cross-references right)' refman.log && [ $$latex_count -gt 0 ] ;\
+ 	    do \
+ 	      echo "Rerunning latex...." ;\
+ 	      pdflatex refman ;\
+@@ -43,7 +43,7 @@
+ 	echo "Rerunning latex...."
+ 	{{ config.LATEX_CMD_NAME }} refman.tex
+ 	latex_count=8 ; \
+-	while egrep -s 'Rerun (LaTeX|to get cross-references right)' refman.log && [ $$latex_count -gt 0 ] ;\
++	while grep -E -s 'Rerun (LaTeX|to get cross-references right)' refman.log && [ $$latex_count -gt 0 ] ;\
+ 	    do \
+ 	      echo "Rerunning latex...." ;\
+ 	      {{ config.LATEX_CMD_NAME }} refman.tex ;\
+--- doxygen-1.9.6.orig/src/latexgen.cpp	2023-03-09 11:10:52.092688592 +0100
++++ doxygen-1.9.6/src/latexgen.cpp	2023-03-09 11:11:07.666867516 +0100
+@@ -346,7 +346,7 @@
+     t << "\techo \"Rerunning latex....\"\n"
+       << "\t$(LATEX_CMD) $(MANUAL_FILE).tex\n"
+       << "\tlatex_count=$(LATEX_COUNT) ; \\\n"
+-      << "\twhile egrep -s 'Rerun (LaTeX|to get cross-references right|to get bibliographical references right)' $(MANUAL_FILE).log && [ $$latex_count -gt 0 ] ;\\\n"
++      << "\twhile grep -E -s 'Rerun (LaTeX|to get cross-references right|to get bibliographical references right)' $(MANUAL_FILE).log && [ $$latex_count -gt 0 ] ;\\\n"
+       << "\t    do \\\n"
+       << "\t      echo \"Rerunning latex....\" ;\\\n"
+       << "\t      $(LATEX_CMD) $(MANUAL_FILE).tex ; \\\n"
+@@ -374,7 +374,7 @@
+     }
+     t << "\t$(LATEX_CMD) $(MANUAL_FILE)\n"
+       << "\tlatex_count=$(LATEX_COUNT) ; \\\n"
+-      << "\twhile egrep -s 'Rerun (LaTeX|to get cross-references right|to get bibliographical references right)' $(MANUAL_FILE).log && [ $$latex_count -gt 0 ] ;\\\n"
++      << "\twhile grep -E -s 'Rerun (LaTeX|to get cross-references right|to get bibliographical references right)' $(MANUAL_FILE).log && [ $$latex_count -gt 0 ] ;\\\n"
+       << "\t    do \\\n"
+       << "\t      echo \"Rerunning latex....\" ;\\\n"
+       << "\t      $(LATEX_CMD) $(MANUAL_FILE) ;\\\n"
diff --git a/doxygen.spec b/doxygen.spec
index c101895..6009311 100644
--- a/doxygen.spec
+++ b/doxygen.spec
@@ -22,7 +22,7 @@ Name:    doxygen
 Epoch:   2
 Version: 1.9.6
 %if 0%{?stable}
-Release: 6%{?dist}
+Release: 7%{?dist}
 %else
 %global commit e18f715eb55121a4219d00bc4d824cebf1fb504b
 %global shortcommit %(c=%{commit}; echo ${c:0:7})
@@ -42,6 +42,7 @@ Source1: doxywizard.desktop
 # these icons are part of doxygen and converted from doxywizard.ico
 Source2: doxywizard-icons.tar.xz
 # upstream patches
+Patch0: doxygen-obsolete-egrep.patch
 
 BuildRequires: %{_bindir}/python3
 BuildRequires: gcc-c++ gcc
@@ -320,6 +321,9 @@ desktop-file-install --dir=%{buildroot}%{_datadir}/applications %{SOURCE1}
 %endif
 
 %changelog
+* Fri Mar 10 2023 Than Ngo <than@redhat.com> - 2:1.9.6-7
+- replace obsolescent egrep with grep -E 
+
 * Fri Feb 17 2023 Than Ngo <than@redhat.com> - 2:1.9.6-6
 - migrated to SPDX license