diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index cf40a8284a380fd2f7d6e3a077521bc6845d9717..5061a2ec4564604dbf2cb75230000dd09d34d151 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -677,7 +677,7 @@ void read_trace_pipe(void)
 		static char buf[4096];
 		ssize_t sz;
 
-		sz = read(trace_fd, buf, sizeof(buf));
+		sz = read(trace_fd, buf, sizeof(buf) - 1);
 		if (sz > 0) {
 			buf[sz] = 0;
 			puts(buf);