diff --git a/rc/tools/clang.kak b/rc/tools/clang.kak
index 9022cf26..10ce05e6 100644
--- a/rc/tools/clang.kak
+++ b/rc/tools/clang.kak
@@ -88,12 +88,12 @@ The syntaxic errors detected during parsing are shown when auto-diagnostics are
                 printf %s\\n "evaluate-commands -client ${kak_client} echo 'clang parsing done'" | kak -p ${kak_session}
             fi
 
-            flags=$(cat ${dir}/stderr | sed -rne "
+            flags=$(cat ${dir}/stderr | sed -Ene "
                         /^<stdin>:[0-9]+:([0-9]+:)? (fatal )?error/ { s/^<stdin>:([0-9]+):.*/'\1|{red}█'/; p }
                         /^<stdin>:[0-9]+:([0-9]+:)? warning/ { s/^<stdin>:([0-9]+):.*/'\1|{yellow}█'/; p }
                     " | paste -s -d ' ' -)
 
-            errors=$(cat ${dir}/stderr | sed -rne "
+            errors=$(cat ${dir}/stderr | sed -Ene "
                         /^<stdin>:[0-9]+:([0-9]+:)? ((fatal )?error|warning)/ {
                             s/'/''/g; s/^<stdin>:([0-9]+):([0-9]+:)? (.*)/'\1|\3'/; p
                         }" | sort -n | paste -s -d ' ' -)
diff --git a/rc/tools/ctags.kak b/rc/tools/ctags.kak
index b39eeb66..c2d48389 100644
--- a/rc/tools/ctags.kak
+++ b/rc/tools/ctags.kak
@@ -88,7 +88,7 @@ define-command ctags-funcinfo -docstring "Display ctags information about a sele
                 f=${kak_selection%?}
                 sig='\tsignature:(.*)'
                 csn='\t(class|struct|namespace):(\S+)'
-                sigs=$(${kak_opt_readtagscmd} -e -Q '(eq? $kind "f")' "${f}" | sed -re "s/^.*${csn}.*${sig}$/\3 [\2::${f}]/ ;t ;s/^.*${sig}$/\1 [${f}]/")
+                sigs=$(${kak_opt_readtagscmd} -e -Q '(eq? $kind "f")' "${f}" | sed -Ee "s/^.*${csn}.*${sig}$/\3 [\2::${f}]/ ;t ;s/^.*${sig}$/\1 [${f}]/")
                 if [ -n "$sigs" ]; then
                     printf %s\\n "evaluate-commands -client ${kak_client} %{info -anchor $kak_cursor_line.$kak_cursor_column -style above '$sigs'}"
                 fi