diff --git a/configure b/configure
index 21a60dee3..fa2b6dfe7 100755
--- a/configure
+++ b/configure
@@ -2529,7 +2529,7 @@ LIBUNBOUND_AGE=0
 
 
 
-function pretty_cmdline {
+pretty_cmdline() {
 	cmdline=""
 	while test -n "$1"; do
 		cmdline="$cmdline '"`echo $1 | sed -e 's/\\\\/\\\\\\\\/g' | sed -e 's/"/\\\\"/g' `"'"
diff --git a/configure.ac b/configure.ac
index e72e28817..304e8765b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,7 +54,7 @@ AC_SUBST(LIBUNBOUND_CURRENT)
 AC_SUBST(LIBUNBOUND_REVISION)
 AC_SUBST(LIBUNBOUND_AGE)
 
-function pretty_cmdline {
+pretty_cmdline() {
 	cmdline=""
 	while test -n "$1"; do
 		cmdline="$cmdline '"`echo $1 | sed -e 's/\\\\/\\\\\\\\/g' | sed -e 's/"/\\\\"/g' `"'"