diff --git a/src/cam.c b/src/cam.c
index fdb49fc..b6f6b7e 100644
--- a/src/cam.c
+++ b/src/cam.c
@@ -111,8 +111,9 @@ static int mk_cam(facilities_t* facilities, uint8_t *cam, uint32_t *cam_len) {
         }
     } else {
         cam_tx->cam.camParameters.highFrequencyContainer.present = HighFrequencyContainer_PR_rsuContainerHighFrequency;
+        if (facilities->lightship->pz_len > 0) {
         cam_tx->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU = calloc(1, sizeof(ProtectedCommunicationZonesRSU_t));
-
+        
         cam_tx->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU->list.count = facilities->lightship->pz_len;
         cam_tx->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU->list.size = facilities->lightship->pz_len * sizeof(void*);
         cam_tx->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU->list.array = malloc(facilities->lightship->pz_len * sizeof(void*));
@@ -135,6 +136,7 @@ static int mk_cam(facilities_t* facilities, uint8_t *cam, uint32_t *cam_len) {
                 *cam_tx->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU->list.array[i]->protectedZoneRadius = *facilities->lightship->pz[i]->protectedZoneRadius;
             }
         }
+        }
 
     }