diff --git a/include/zephyr/data/jwt.h b/include/zephyr/data/jwt.h
index 8d6121b939498e..d198251f744a5c 100644
--- a/include/zephyr/data/jwt.h
+++ b/include/zephyr/data/jwt.h
@@ -110,12 +110,6 @@ int jwt_sign(struct jwt_builder *builder,
 	     const char *der_key,
 	     size_t der_key_len);
 
-
-static inline size_t jwt_payload_len(struct jwt_builder *builder)
-{
-	return (builder->buf - builder->base);
-}
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/tests/subsys/jwt/src/main.c b/tests/subsys/jwt/src/main.c
index ab61cd36220263..7ca5ed1e6a8523 100644
--- a/tests/subsys/jwt/src/main.c
+++ b/tests/subsys/jwt/src/main.c
@@ -50,7 +50,7 @@ ZTEST(jwt_tests, test_jwt)
 	zassert_equal(build.overflowed, false, "Not overflow");
 
 	printk("JWT:\n%s\n", buf);
-	printk("len: %zd\n", jwt_payload_len(&build));
+	printk("len: %zd\n", strlen(buf));
 }
 
 ZTEST_SUITE(jwt_tests, NULL, NULL, NULL, NULL, NULL);