diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 634857c..3684e98 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -41,6 +41,7 @@
 #include "ecp.h"
 #include "md.h"
 #include "pk.h"
+#include "oid.h"
 
 /* Translations for symmetric crypto. */