diff --git a/include/villas/fpga/card.h b/include/villas/fpga/card.h
index 5ca255501..90fc48142 100644
--- a/include/villas/fpga/card.h
+++ b/include/villas/fpga/card.h
@@ -29,6 +29,8 @@
 
 #pragma once
 
+#include <jansson.h>
+
 #include "common.h"
 #include "kernel/pci.h"
 #include "kernel/vfio.h"