diff --git a/libtransmission/crypto-utils-cyassl.cc b/libtransmission/crypto-utils-cyassl.cc
index d1574dc4e..a9cdacb0e 100644
--- a/libtransmission/crypto-utils-cyassl.cc
+++ b/libtransmission/crypto-utils-cyassl.cc
@@ -18,6 +18,7 @@
 #define API_VERSION_HEX LIBCYASSL_VERSION_HEX
 #endif
 
+#include API_HEADER(options.h)
 #include API_HEADER_CRYPT(dh.h)
 #include API_HEADER_CRYPT(error-crypt.h)
 #include API_HEADER_CRYPT(random.h)