diff --git a/src/main.c b/src/main.c
index 5cc4dd6..a36847f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -397,7 +397,10 @@ int main(int argc, char **argv) {
                 }
                 fcntl(soc, F_SETFL, O_NONBLOCK);
                 strcpy(ifr.ifr_name, "can0");
-                ioctl(soc, SIOCGIFINDEX, &ifr);
+                if (ioctl(soc, SIOCGIFINDEX, &ifr) < 0) {
+                        perror("ioctl error");
+                        return 1;
+                }
                 addr.can_family = AF_CAN;
                 addr.can_ifindex = ifr.ifr_ifindex;
                 if (bind(soc, (struct sockaddr *)&addr, sizeof(addr)) < 0) {