--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,9 @@ LDLIBS += `pkg-config --libs openssl`
reglib.o: keys-ssl.c
-else
+endif
+
+ifeq ($(USE_GCRYPT),1)
CFLAGS += -DUSE_GCRYPT
LDLIBS += -lgcrypt