diff --git a/blast/src/DBoundaryLayer.h b/blast/src/DBoundaryLayer.h
index e255069aa7f36a41924dc6e26c92b32d3aca4352..ec04200a6c1e35e0992e7d105cfbaeb08399ebf4 100644
--- a/blast/src/DBoundaryLayer.h
+++ b/blast/src/DBoundaryLayer.h
@@ -5,6 +5,8 @@
 #include "wObject.h"
 #include "DClosures.h"
 
+#include <algorithm>
+
 namespace blast
 {