diff --git a/tinycrypt/ecc.c b/tinycrypt/ecc.c
index 2e694cc..ab1956a 100644
--- a/tinycrypt/ecc.c
+++ b/tinycrypt/ecc.c
@@ -52,6 +52,12 @@
  *  POSSIBILITY OF SUCH DAMAGE.
  */
 
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
 #if defined(MBEDTLS_USE_TINYCRYPT)
 #include <tinycrypt/ecc.h>
 #include <string.h>