diff --git a/glibc.req.in b/glibc.req.in
index 9fb7f76..b82c5a1 100644
--- a/glibc.req.in
+++ b/glibc.req.in
@@ -28,10 +28,10 @@ eu-elfclassify --loadable --file --stdin --print | while read path; do
     if $searching; then
 	# Undefined symbols within latest, under-development
 	# (changing) symbol versions trigger the versioned RPM
-	# dependency.  Do not use "egrep -q" to keep reading from the
+	# dependency.  Do not use "grep -Eq" to keep reading from the
 	# pipe, avoiding a spurious EPIPE error in eu-readelf.
 	if eu-readelf -s "$path" \
-		| egrep '\sUNDEF\s.*@''@SYMVER@(\s|$)' >/dev/null
+		| grep -E '\sUNDEF\s.*@''@SYMVER@(\s|$)' >/dev/null
 	then
 	    echo 'glibc >= @VERSION@-@RELEASE@'
 	    # Stop searching after the first match, but keep reading from
diff --git a/glibc.spec b/glibc.spec
index 83ed24b..242dec4 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1716,8 +1716,8 @@ grep '%{_prefix}/include/gnu/stubs-.*\.h$' < master.filelist >> devel.filelist |
 grep '%{_prefix}/include/gnu/lib-names-.*\.h$' < master.filelist >> devel.filelist || :
 # Put the include files into headers file list.
 grep '%{_prefix}/include' < master.filelist \
-  | egrep -v '%{_prefix}/include/gnu/stubs-.*\.h$' \
-  | egrep -v '%{_prefix}/include/gnu/lib-names-.*\.h$' \
+  | grep -E -v '%{_prefix}/include/gnu/stubs-.*\.h$' \
+  | grep -E -v '%{_prefix}/include/gnu/lib-names-.*\.h$' \
   > headers.filelist
 %else
 # If there is no glibc-headers package, all header files go into the