diff --git a/tools/bpf/bpftool/sign.c b/tools/bpf/bpftool/sign.c
index b29d825bb1d41..b34f74d210e9c 100644
--- a/tools/bpf/bpftool/sign.c
+++ b/tools/bpf/bpftool/sign.c
@@ -11,7 +11,6 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include <string.h>
-#include <string.h>
 #include <getopt.h>
 #include <err.h>
 #include <openssl/opensslv.h>