diff --git a/CMakeLists.txt b/CMakeLists.txt
index a44021cda7..fec59f2fb1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2023,7 +2023,9 @@ CHECK_CRYPTO("MD5;RMD160;SHA1;SHA256;SHA384;SHA512" NETTLE)
 CHECK_CRYPTO("MD5;RMD160;SHA1;SHA256;SHA384;SHA512" OPENSSL)
 
 # Libmd has to be probed after OpenSSL.
-CHECK_CRYPTO("MD5;RMD160;SHA1;SHA256;SHA512" LIBMD)
+if(LIBMD)
+  CHECK_CRYPTO("MD5;RMD160;SHA1;SHA256;SHA512" LIBMD)
+endif()
 
 CHECK_CRYPTO_WIN("MD5;SHA1;SHA256;SHA384;SHA512")