diff --git a/openair2/COMMON/platform_constants.h b/openair2/COMMON/platform_constants.h
index 7a7e984aca..1eb58b16b2 100644
--- a/openair2/COMMON/platform_constants.h
+++ b/openair2/COMMON/platform_constants.h
@@ -73,7 +73,9 @@
   #ifdef UESIM_EXPANSION
     #define MAX_MOBILES_PER_ENB         256
     #define MAX_MOBILES_PER_ENB_NB_IoT  256
+    #define MAX_MOBILES_PER_GNB         256
     #define MAX_eNB                      2
+    #define MAX_gNB                      2
   #else
     #ifdef LARGE_SCALE
       #define MAX_MOBILES_PER_ENB         128