diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index a044c57..1536ebe 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -172,6 +172,13 @@
 }
 #endif /* MBEDTLS_RSA_C */
 
+#if defined(MBEDTLS_USE_TINYCRYPT)
+static inline mbedtls_uecc_keypair *mbedtls_uecc_pk( const mbedtls_pk_context pk )
+{
+    return( (mbedtls_uecc_keypair *) (pk).pk_ctx );
+}
+#endif
+
 #if defined(MBEDTLS_ECP_C)
 /**
  * Quick access to an EC context inside a PK context.