diff --git a/flaim/configure.ac b/flaim/configure.ac
index adfcf8c..6be7818 100644
--- a/flaim/configure.ac
+++ b/flaim/configure.ac
@@ -7,7 +7,7 @@ AM_INIT_AUTOMAKE([-Wall -Werror])
 LT_PREREQ([2.2])
 LT_INIT([dlopen])
 
-AC_LANG(C++)
+AC_LANG([C++])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/flaim.h])
diff --git a/sql/configure.ac b/sql/configure.ac
index 3049850..3e6d891 100644
--- a/sql/configure.ac
+++ b/sql/configure.ac
@@ -7,7 +7,7 @@ AM_INIT_AUTOMAKE([-Wall -Werror])
 LT_PREREQ([2.2])
 LT_INIT([dlopen])
 
-AC_LANG(C++)
+AC_LANG([C++])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/flaimsql.h])
diff --git a/xflaim/configure.ac b/xflaim/configure.ac
index a0c3e22..c66e6af 100644
--- a/xflaim/configure.ac
+++ b/xflaim/configure.ac
@@ -8,7 +8,7 @@ AM_INIT_AUTOMAKE([-Wall -Werror])
 LT_PREREQ([2.2])
 LT_INIT([dlopen])
 
-AC_LANG(C++)
+AC_LANG([C++])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/xflaim.h])