diff --git a/package/rtty/rtty.mk b/package/rtty/rtty.mk
index 5d1ef4a091..88599f6636 100644
--- a/package/rtty/rtty.mk
+++ b/package/rtty/rtty.mk
@@ -12,13 +12,25 @@ RTTY_DEPENDENCIES = libev
 
 ifeq ($(BR2_PACKAGE_MBEDTLS),y)
 RTTY_DEPENDENCIES += mbedtls
-RTTY_CONF_OPTS += -DRTTY_USE_MBEDTLS=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=ON \
+	-DRTTY_USE_OPENSSL=OFF \
+	-DRTTY_USE_WOLFSSL=OFF
 else ifeq ($(BR2_PACKAGE_OPENSSL),y)
 RTTY_DEPENDENCIES += host-pkgconf openssl
-RTTY_CONF_OPTS += -DRTTY_USE_OPENSSL=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=OFF \
+	-DRTTY_USE_OPENSSL=ON \
+	-DRTTY_USE_WOLFSSL=OFF
 else ifeq ($(BR2_PACKAGE_WOLFSSL),y)
 RTTY_DEPENDENCIES += wolfssl
-RTTY_CONF_OPTS += -DRTTY_USE_WOLFSSL=ON
+RTTY_CONF_OPTS += \
+	-DRTTY_SSL_SUPPORT=ON \
+	-DRTTY_USE_MBEDTLS=OFF \
+	-DRTTY_USE_OPENSSL=OFF \
+	-DRTTY_USE_WOLFSSL=ON
 else
 RTTY_CONF_OPTS += -DRTTY_SSL_SUPPORT=OFF
 endif