diff --git a/crda/Makefile b/crda/Makefile
index 6ca26f3..457ba13 100644
--- a/crda/Makefile
+++ b/crda/Makefile
@@ -116,7 +116,7 @@ keys-%.c: utils/key2pub.py $(wildcard $(PUBKEY_DIR)/*.pem)
 
 $(LIBREG): reglib.c regdb.h reglib.h
 	$(NQ) '  CC  ' $@
-	$(Q)$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -shared -Wl,-soname,$(LIBREG) $<
+	$(Q)$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -shared -Wl,-soname,$(LIBREG) $(LDFLAGS) $< -lgcrypt -lm
 
 install-libreg-headers:
 	$(NQ) '  INSTALL  libreg-headers'