diff --git a/init/bash_completion.in b/init/bash_completion.in
index b1188061..a93381f4 100644
--- a/init/bash_completion.in
+++ b/init/bash_completion.in
@@ -21,7 +21,7 @@ _module_savelist() {
 }
 
 _module_not_yet_loaded() {
-    _module_avail | sort | sed -r "\%^(${LOADEDMODULES//:/|})$%d"
+    _module_avail | sort | sed -E "\%^(${LOADEDMODULES//:/|})$%d"
 }
 
 _module_long_arg_list() {
diff --git a/init/zsh-functions/_module b/init/zsh-functions/_module
index 45042d10..50718b12 100644
--- a/init/zsh-functions/_module
+++ b/init/zsh-functions/_module
@@ -25,7 +25,7 @@ _module_savelist() {
 }
 
 _module_not_yet_loaded() {
-   _module_avail | sort | sed -r "\%^(${LOADEDMODULES//:/|})$%d"
+   _module_avail | sort | sed -E "\%^(${LOADEDMODULES//:/|})$%d"
 }