diff --git a/app/iscsi_top/iscsi_top.cpp b/app/iscsi_top/iscsi_top.cpp
index 58acf63a0..eaab265f9 100644
--- a/app/iscsi_top/iscsi_top.cpp
+++ b/app/iscsi_top/iscsi_top.cpp
@@ -90,7 +90,7 @@ print_connections(void)
 	int			fd, i;
 	char			shm_name[64];
 
-	sprintf(shm_name, "spdk_iscsi_conns.%d", g_shm_id);
+	snprintf(shm_name, sizeof(shm_name), "spdk_iscsi_conns.%d", g_shm_id);
 	fd = shm_open(shm_name, O_RDONLY, 0600);
 	if (fd < 0) {
 		fprintf(stderr, "Cannot open shared memory: %s\n", shm_name);
@@ -158,7 +158,7 @@ int main(int argc, char **argv)
 		}
 	}
 
-	sprintf(spdk_trace_shm_name, "/iscsi_trace.%d", g_shm_id);
+	snprintf(spdk_trace_shm_name, sizeof(spdk_trace_shm_name), "/iscsi_trace.%d", g_shm_id);
 	history_fd = shm_open(spdk_trace_shm_name, O_RDONLY, 0600);
 	if (history_fd < 0) {
 		fprintf(stderr, "Unable to open history shm %s\n", spdk_trace_shm_name);