diff --git a/configs/baremetal.h b/configs/baremetal.h
index 64d9e04..1f9a129 100644
--- a/configs/baremetal.h
+++ b/configs/baremetal.h
@@ -45,6 +45,8 @@
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_PARSE_C
 
+#define MBEDTLS_ENTROPY_MAX_SOURCES 1
+
 #define MBEDTLS_SSL_CONF_SINGLE_EC
 #define MBEDTLS_SSL_CONF_SINGLE_UECC_GRP_ID MBEDTLS_UECC_DP_SECP256R1
 #define MBEDTLS_SSL_CONF_SINGLE_EC_TLS_ID 23