diff --git a/src/libstrongswan/plugins/x509/x509_crl.c b/src/libstrongswan/plugins/x509/x509_crl.c
index 1748edb9c..4c2511be1 100644
--- a/src/libstrongswan/plugins/x509/x509_crl.c
+++ b/src/libstrongswan/plugins/x509/x509_crl.c
@@ -24,6 +24,7 @@ typedef struct revoked_t revoked_t;
 #include <library.h>
 #include <asn1/asn1.h>
 #include <credentials/certificates/x509.h>
+#include <utils/linked_list.h>
 
 /**
  * entry for a revoked certificate