Add error string for failure code in `mbedtls_dhm_set_group`
diff --git a/library/error.c b/library/error.c
index db42381..6fa0c21 100644
--- a/library/error.c
+++ b/library/error.c
@@ -206,6 +206,8 @@
mbedtls_snprintf( buf, buflen, "DHM - Allocation of memory failed" );
if( use_ret == -(MBEDTLS_ERR_DHM_FILE_IO_ERROR) )
mbedtls_snprintf( buf, buflen, "DHM - Read/write of file failed" );
+ if( use_ret == -(MBEDTLS_ERR_DHM_SET_GROUP_FAILED) )
+ mbedtls_snprintf( buf, buflen, "DHM - Setting modulus and generator failed" );
#endif /* MBEDTLS_DHM_C */
#if defined(MBEDTLS_ECP_C)