2 files changed, 6 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index e636253..606e644 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,2 +15,3 @@ AC_HEADER_STDC
 AC_CHECK_FUNCS([timegm])
+AC_CHECK_HEADERS([ext/algorithm.h])
 
diff --git a/test/OP.cc b/test/OP.cc
index 6012b2e..4e2a5ed 100644
--- a/test/OP.cc
+++ b/test/OP.cc
@@ -4,3 +4,2 @@
 #include <string>
-#include <ext/algorithm>
 using namespace std;
@@ -18,2 +17,7 @@ using namespace std;
 
+#include "config.h"
+#ifdef HAVE_EXT_ALGORITHM_H
+# include <ext/algorithm>
+#endif
+
 #include "sqlite.h"