diff --git a/srslte/lib/ch_estimation/refsignal_ul.c b/srslte/lib/ch_estimation/refsignal_ul.c
index 854c87d3a..18003b451 100644
--- a/srslte/lib/ch_estimation/refsignal_ul.c
+++ b/srslte/lib/ch_estimation/refsignal_ul.c
@@ -681,13 +681,13 @@ int srslte_refsignal_srs_send_cs(uint32_t subframe_config, uint32_t sf_idx) {
       } else {
         return 0; 
       }
-    } else if (subframe_config == 8) {
+    } else if (subframe_config == 7) {
       if (((sf_idx%tsfc)==0) || ((sf_idx%tsfc)==1)){
         return 1; 
       } else {
         return 0; 
       }
-    } else if (subframe_config == 9) {
+    } else if (subframe_config == 8) {
       if (((sf_idx%tsfc)==2) || ((sf_idx%tsfc)==3)){
         return 1; 
       } else {