diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index fd76b27b48..0a039710ab 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -572,6 +572,7 @@ static psa_status_t psa_import_ec_private_key( psa_ecc_curve_t curve,
     ecp = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) );
     if( ecp == NULL )
         return( PSA_ERROR_INSUFFICIENT_MEMORY );
+    mbedtls_ecp_keypair_init( ecp );
 
     /* Load the group. */
     status = mbedtls_to_psa_error(