diff --git a/src/rds.c b/src/rds.c
index 4f4c8fc..f3354de 100644
--- a/src/rds.c
+++ b/src/rds.c
@@ -470,6 +470,7 @@ void init_rds_encoder(RDSEncoder* enc) {
 	enc->data[enc->program].pi = 0xFFFF;
 	strcpy((char *)enc->data[enc->program].ps, "* RDS * ");
 	enc->data[enc->program].rt1_enabled = 1;
+	memset(enc->data->rt1, ' ', 64);
 
 	enc->state[enc->program].rt_ab = 1;
 	enc->state[enc->program].ptyn_ab = 1;