--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,9 @@
 
 AC_USE_SYSTEM_EXTENSIONS
 AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION([0.18.1])
+dnl Support for AM_GNU_GETTEXT_REQUIRE_VERSION was added in 0.19.6.
+AM_GNU_GETTEXT_REQUIRE_VERSION([0.19.6])
+AM_GNU_GETTEXT_VERSION([0.19.6])
 
 AC_DEFUN([ABOOK_EXPAND_PREFIX], [
 	$1=$2