diff --git a/CMakeLists.txt b/CMakeLists.txt
index bba08c85a..d708c493c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -582,6 +582,8 @@ MACRO(CHECK_CRYPTO ALGORITHMS IMPLEMENTATION)
 	    SET(TRY_CRYPTO_REQUIRED_LIBS
 	        "-DLINK_LIBRARIES:STRING=${OPENSSL_LIBRARIES}")
 	ELSEIF("${IMPLEMENTATION}" MATCHES "^NETTLE$" AND NETTLE_FOUND)
+	    SET(TRY_CRYPTO_REQUIRED_INCLUDES
+	      "${TRY_CRYPTO_REQUIRED_INCLUDES};${NETTLE_INCLUDE_DIR}")
 	    SET(TRY_CRYPTO_REQUIRED_LIBS
 	        "-DLINK_LIBRARIES:STRING=${NETTLE_LIBRARY}")
 	ELSEIF("${IMPLEMENTATION}" MATCHES "^LIBMD$" AND LIBMD_FOUND)