diff --git a/srslte/lib/common/src/phy_common.c b/srslte/lib/common/src/phy_common.c
index 4987db530..fb988e01c 100644
--- a/srslte/lib/common/src/phy_common.c
+++ b/srslte/lib/common/src/phy_common.c
@@ -231,11 +231,11 @@ int srslte_symbol_sz(uint32_t nof_prb) {
     } else if (nof_prb<=25) {
       return 384;
     } else if (nof_prb<=50) {
-      return 768;
+      return 640;
     } else if (nof_prb<=75) {
       return 1024;
     } else if (nof_prb<=100) {
-      return 1536;
+      return 1280;
     } else {
       return SRSLTE_ERROR;
     }
@@ -254,11 +254,11 @@ int srslte_nof_prb(uint32_t symbol_sz)
         return 15;
       case 384:
         return 25;
-      case 768:
+      case 640:
         return 50;
       case 1024:
         return 75;
-      case 1536:
+      case 1280:
         return 100;
     }
   } else {