diff --git a/include/mbedtls/oid.h b/include/mbedtls/oid.h
index a36a20f..4ee3f93 100644
--- a/include/mbedtls/oid.h
+++ b/include/mbedtls/oid.h
@@ -34,9 +34,7 @@
 #include "mbedtls/cipher.h"
 #endif
 
-#if defined(MBEDTLS_MD_C)
 #include "mbedtls/md.h"
-#endif
 
 /** OID is not found. */
 #define MBEDTLS_ERR_OID_NOT_FOUND                         -0x002E