diff --git a/configure b/configure
index aa81eff0..d61de412 100755
--- a/configure
+++ b/configure
@@ -2408,7 +2408,7 @@ CXXFLAGS="-D_GNU_SOURCE"
 INCLUDES=""
 LIBS=""
 
-function appendLib {
+appendLib () {
 	if test "$LIBS" != ""; then
 		LIBS="$LIBS $*"
 	else
@@ -2416,7 +2416,7 @@ function appendLib {
 	fi
 }
 
-function appendInc {
+appendInc () {
 	if test "$INCLUDES" != ""; then
 		INCLUDES="$INCLUDES $*"
 	else
@@ -2424,7 +2424,7 @@ function appendInc {
 	fi
 }
 
-function appendCXX {
+appendCXX () {
 	if test "$CXXFLAGS" != ""; then
 		CXXFLAGS="$CXXFLAGS $*"
 	else
@@ -2432,7 +2432,7 @@ function appendCXX {
 	fi
 }
 
-function appendLD {
+appendLD () {
 	if test "$LDFLAGS" != ""; then
 		LDFLAGS="$LDFLAGS $*"
 	else
diff --git a/configure.in b/configure.in
index 3cf60fcb..7763c496 100644
--- a/configure.in
+++ b/configure.in
@@ -7,7 +7,7 @@ CXXFLAGS="-D_GNU_SOURCE"
 INCLUDES=""
 LIBS=""
 
-function appendLib {
+appendLib () {
 	if test "$LIBS" != ""; then
 		LIBS="$LIBS $*"
 	else
@@ -15,7 +15,7 @@ function appendLib {
 	fi
 }
 
-function appendInc {
+appendInc () {
 	if test "$INCLUDES" != ""; then
 		INCLUDES="$INCLUDES $*"
 	else
@@ -23,7 +23,7 @@ function appendInc {
 	fi
 }
 
-function appendCXX {
+appendCXX () {
 	if test "$CXXFLAGS" != ""; then
 		CXXFLAGS="$CXXFLAGS $*"
 	else
@@ -31,7 +31,7 @@ function appendCXX {
 	fi
 }
 
-function appendLD {
+appendLD () {
 	if test "$LDFLAGS" != ""; then
 		LDFLAGS="$LDFLAGS $*"
 	else