diff --git a/tools/testing/selftests/bpf/bpf_kfuncs.h b/tools/testing/selftests/bpf/bpf_kfuncs.h
index f3c41f8902a047..821c25b7d0df3e 100644
--- a/tools/testing/selftests/bpf/bpf_kfuncs.h
+++ b/tools/testing/selftests/bpf/bpf_kfuncs.h
@@ -36,7 +36,7 @@ extern void *bpf_dynptr_slice_rdwr(const struct bpf_dynptr *ptr, __u32 offset,
 			      void *buffer, __u32 buffer__szk) __ksym;
 
 extern int bpf_dynptr_adjust(const struct bpf_dynptr *ptr, __u32 start, __u32 end) __ksym;
-extern int bpf_dynptr_is_null(const struct bpf_dynptr *ptr) __ksym;
+extern bool bpf_dynptr_is_null(const struct bpf_dynptr *ptr) __ksym;
 extern int bpf_dynptr_is_rdonly(const struct bpf_dynptr *ptr) __ksym;
 extern __u32 bpf_dynptr_size(const struct bpf_dynptr *ptr) __ksym;
 extern int bpf_dynptr_clone(const struct bpf_dynptr *ptr, struct bpf_dynptr *clone__init) __ksym;
diff --git a/tools/testing/selftests/bpf/progs/dynptr_fail.c b/tools/testing/selftests/bpf/progs/dynptr_fail.c
index c2f0e18af95169..7ce7e827d5f01c 100644
--- a/tools/testing/selftests/bpf/progs/dynptr_fail.c
+++ b/tools/testing/selftests/bpf/progs/dynptr_fail.c
@@ -3,6 +3,7 @@
 
 #include <errno.h>
 #include <string.h>
+#include <stdbool.h>
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 #include <linux/if_ether.h>
diff --git a/tools/testing/selftests/bpf/progs/dynptr_success.c b/tools/testing/selftests/bpf/progs/dynptr_success.c
index 0c053976f8f9af..5985920d162e7b 100644
--- a/tools/testing/selftests/bpf/progs/dynptr_success.c
+++ b/tools/testing/selftests/bpf/progs/dynptr_success.c
@@ -2,6 +2,7 @@
 /* Copyright (c) 2022 Facebook */
 
 #include <string.h>
+#include <stdbool.h>
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 #include "bpf_misc.h"
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_dynptr.c b/tools/testing/selftests/bpf/progs/test_xdp_dynptr.c
index 25ee4a22e48d94..78c368e7179728 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_dynptr.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_dynptr.c
@@ -2,6 +2,7 @@
 /* Copyright (c) 2022 Meta */
 #include <stddef.h>
 #include <string.h>
+#include <stdbool.h>
 #include <linux/bpf.h>
 #include <linux/if_ether.h>
 #include <linux/if_packet.h>