diff --git a/include/osmocom/gprs/gprs_bssgp_bss.h b/include/osmocom/gprs/gprs_bssgp_bss.h
index e426698..d79b210 100644
--- a/include/osmocom/gprs/gprs_bssgp_bss.h
+++ b/include/osmocom/gprs/gprs_bssgp_bss.h
@@ -65,7 +65,7 @@
 
 int bssgp_tx_fc_bvc(struct bssgp_bvc_ctx *bctx, uint8_t tag,
 		    uint32_t bucket_size, uint32_t bucket_leak_rate,
-		    uint16_t bmax_default_ms, uint32_t r_default_ms,
+		    uint32_t bmax_default_ms, uint32_t r_default_ms,
 		    uint8_t *bucket_full_ratio, uint32_t *queue_delay_ms);
 
 int bssgp_tx_fc_ms(struct bssgp_bvc_ctx *bctx, uint32_t tlli, uint8_t tag,