diff --git a/src/evcsnm.c b/src/evcsnm.c
index a108c4d..89347a8 100644
--- a/src/evcsnm.c
+++ b/src/evcsnm.c
@@ -77,7 +77,7 @@ static int mk_evcsnm(uint8_t *evcsnm_oer, uint32_t *evcsnm_len)
     cs0->accessibility = *create_empty_utf8_string();
     cs0->pricing = *create_empty_utf8_string();
     cs0->openingDaysHours = *create_empty_utf8_string();
-    const booking_url = "ccam.av.it.pt";
+    const char* booking_url = "ccam.av.it.pt";
     cs0->bookingContactInfo = create_utf8_from_string(booking_url, strlen(booking_url)); 
     cs0->chargingSpotsAvailable.list.array = calloc(1, sizeof(void *));
     cs0->chargingSpotsAvailable.list.count = 1;