diff --git a/src/utility/SElementJWS.cpp b/src/utility/SElementJWS.cpp
index d1df7cf..af88d80 100644
--- a/src/utility/SElementJWS.cpp
+++ b/src/utility/SElementJWS.cpp
@@ -13,6 +13,7 @@
  ******************************************************************************/
 
 #include <utility/SElementJWS.h>
+#include <ArduinoECCX08.h>
 #include <utility/ASN1Utils.h>
 #include <utility/PEMUtils.h>