diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 7bcc69c..d44e658 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -112,6 +112,16 @@
 }
 mbedtls_ecp_point;
 
+#if defined(MBEDTLS_ECP_EARLY_RETURN)
+/**
+ * \brief           ECP context for resuming operations after returning
+ *                  \c MBEDTLS_ERR_ECP_IN_PROGRESS
+ *
+ * \note            Opaque struct
+ */
+typedef struct mbedtls_ecp_restart mbedtls_ecp_restart_ctx;
+#endif
+
 /**
  * \brief           ECP group structure
  *
@@ -153,6 +163,9 @@
     void *t_data;                       /*!< unused                         */
     mbedtls_ecp_point *T;       /*!<  pre-computed points for ecp_mul_comb()        */
     size_t T_size;      /*!<  number for pre-computed points                */
+#if defined(MBEDTLS_ECP_EARLY_RETURN)
+    mbedtls_ecp_restart_ctx *rs;        /*!<  context for resuming operation */
+#endif
 }
 mbedtls_ecp_group;