diff --git a/configs/config-symmetric-only.h b/configs/config-symmetric-only.h
index d7070b8..f73db3a 100644
--- a/configs/config-symmetric-only.h
+++ b/configs/config-symmetric-only.h
@@ -69,6 +69,7 @@
 #define MBEDTLS_SHA256_C
 #define MBEDTLS_SHA384_C
 #define MBEDTLS_SHA512_C
+#define MBEDTLS_SHA3_C
 //#define MBEDTLS_THREADING_C
 #define MBEDTLS_TIMING_C
 #define MBEDTLS_VERSION_C