diff --git a/lib/include/srslte/phy/phch/dci.h b/lib/include/srslte/phy/phch/dci.h
index f57f2d87c..ba977b97d 100644
--- a/lib/include/srslte/phy/phch/dci.h
+++ b/lib/include/srslte/phy/phch/dci.h
@@ -82,7 +82,7 @@ typedef struct SRSLTE_API {
   uint16_t              rnti;
   srslte_dci_format_t   format;
   srslte_dci_location_t location;
-  int                   ue_cc_idx;
+  uint32_t              ue_cc_idx;
 
   // Resource Allocation
   srslte_ra_type_t alloc_type;
@@ -133,7 +133,7 @@ typedef struct SRSLTE_API {
   uint16_t              rnti;
   srslte_dci_format_t   format;
   srslte_dci_location_t location;
-  int                   ue_cc_idx;
+  uint32_t              ue_cc_idx;
 
   srslte_ra_type2_t type2_alloc;
   /* 36.213 Table 8.4-2: SRSLTE_RA_PUSCH_HOP_HALF is 0 for < 10 Mhz and 10 for > 10 Mhz.
diff --git a/srsenb/src/stack/mac/scheduler_grid.cc b/srsenb/src/stack/mac/scheduler_grid.cc
index 4d83bc1ed..c078aaa0b 100644
--- a/srsenb/src/stack/mac/scheduler_grid.cc
+++ b/srsenb/src/stack/mac/scheduler_grid.cc
@@ -1000,7 +1000,7 @@ int sf_sched::generate_format1a(uint32_t         rb_start,
   dci->tb[0].rv         = rv;
   dci->format           = SRSLTE_DCI_FORMAT1A;
   dci->rnti             = rnti;
-  dci->ue_cc_idx        = -1;
+  dci->ue_cc_idx        = std::numeric_limits<uint32_t>::max();
 
   return tbs;
 }