diff --git a/plugins/solve_fsm/src/solve_fsm.cpp b/plugins/solve_fsm/src/solve_fsm.cpp
index ef9685471b6..33f22a24890 100644
--- a/plugins/solve_fsm/src/solve_fsm.cpp
+++ b/plugins/solve_fsm/src/solve_fsm.cpp
@@ -10,6 +10,7 @@
 #include "hal_core/netlist/gate_library/gate_type_component/state_component.h"
 #include "hal_core/netlist/net.h"
 
+#include <bitset>
 #include <fstream>
 #include <queue>
 
@@ -581,4 +582,4 @@ namespace hal
             return OK(graph_str);
         }
     }    // namespace solve_fsm
-}    // namespace hal
\ No newline at end of file
+}    // namespace hal