diff --git a/src/library/blast/state.cpp b/src/library/blast/state.cpp
index 5a09a2b40..672d35a6f 100644
--- a/src/library/blast/state.cpp
+++ b/src/library/blast/state.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <vector>
 #include <algorithm>
 #include "kernel/instantiate.h"
 #include "kernel/abstract.h"