diff --git a/alternative_wmiircs/ruby/README b/alternative_wmiircs/ruby/README
index 894c0cbe..e33962cc 100644
--- a/alternative_wmiircs/ruby/README
+++ b/alternative_wmiircs/ruby/README
@@ -72,7 +72,7 @@ Installation:
 Documentation:
 
     # see list of all key bindings
-    egrep '^ +\$\{\w+\}' @LOCALCONF@/config.yaml
+    grep -E '^ +\$\{\w+\}' @LOCALCONF@/config.yaml
 
     # read the configuration file
     less @LOCALCONF@/config.yaml
diff --git a/util/link b/util/link
index d1f5b06a..8a2c3cc4 100755
--- a/util/link
+++ b/util/link
@@ -32,8 +32,8 @@ $LD -o $outfile $ofiles $LDFLAGS $args >$xtmp 2>&1
 status=$?
 [ $status -eq 0 ] || echo $LD -o $outfile $ofiles $LDFLAGS $args >&2
 
-sed 's/.*: In function `[^:]*: *//' $xtmp | egrep . |
-egrep -v 'is almost always misused|is dangerous, better use|in statically linked applications requires at runtime'
+sed 's/.*: In function `[^:]*: *//' $xtmp | grep -E . |
+grep -E -v 'is almost always misused|is dangerous, better use|in statically linked applications requires at runtime'
 rm -f $xtmp
 
 exit $status