diff --git a/configure.ac b/configure.ac
index b6f92f1..b057550 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,7 +55,7 @@ AC_TYPE_SIZE_T
 AC_FUNC_SELECT_ARGTYPES
 AC_TYPE_SIGNAL
 AC_FUNC_STRERROR_R
-AC_CHECK_FUNCS([strdup strndup strtok_r])
+AC_CHECK_FUNCS([asprintf strdup strndup strtok_r])
 
 LIBLOGNORM_CFLAGS="-I\$(top_srcdir)/src"
 LIBLOGNORM_LIBS="\$(top_builddir)/src/liblognorm.la"