diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
index 946f779a32..ff8b4e8747 100644
--- a/src/basic/fs-util.c
+++ b/src/basic/fs-util.c
@@ -104,7 +104,6 @@ int rmdir_parents(const char *path, const char *stop) {
         return 0;
 }
 
-
 int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) {
         struct stat buf;
         int ret;
@@ -809,3 +808,18 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
 
         return exists;
 }
+
+int access_fd(int fd, int mode) {
+        char p[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1];
+        int r;
+
+        /* Like access() but operates on an already open fd */
+
+        xsprintf(p, "/proc/self/fd/%i", fd);
+
+        r = access(p, mode);
+        if (r < 0)
+                r = -errno;
+
+        return r;
+}
diff --git a/src/basic/fs-util.h b/src/basic/fs-util.h
index d3342d5cda..9849522f5a 100644
--- a/src/basic/fs-util.h
+++ b/src/basic/fs-util.h
@@ -98,3 +98,5 @@ static inline void unlink_and_free(char *p) {
         free(p);
 }
 DEFINE_TRIVIAL_CLEANUP_FUNC(char*, unlink_and_free);
+
+int access_fd(int fd, int mode);
diff --git a/src/test/test-fs-util.c b/src/test/test-fs-util.c
index a5871a25b0..e8fe2b3ff1 100644
--- a/src/test/test-fs-util.c
+++ b/src/test/test-fs-util.c
@@ -315,6 +315,32 @@ static void test_dot_or_dot_dot(void) {
         assert_se(!dot_or_dot_dot("..foo"));
 }
 
+static void test_access_fd(void) {
+        _cleanup_(rmdir_and_freep) char *p = NULL;
+        _cleanup_close_ int fd = -1;
+
+        assert_se(mkdtemp_malloc("/tmp/access-fd.XXXXXX", &p) >= 0);
+
+        fd = open(p, O_RDONLY|O_DIRECTORY|O_CLOEXEC);
+        assert_se(fd >= 0);
+
+        assert_se(access_fd(fd, R_OK) >= 0);
+        assert_se(access_fd(fd, F_OK) >= 0);
+        assert_se(access_fd(fd, W_OK) >= 0);
+
+        assert_se(fchmod(fd, 0000) >= 0);
+
+        assert_se(access_fd(fd, F_OK) >= 0);
+
+        if (geteuid() == 0) {
+                assert_se(access_fd(fd, R_OK) >= 0);
+                assert_se(access_fd(fd, W_OK) >= 0);
+        } else {
+                assert_se(access_fd(fd, R_OK) == -EACCES);
+                assert_se(access_fd(fd, W_OK) == -EACCES);
+        }
+}
+
 int main(int argc, char *argv[]) {
         test_unlink_noerrno();
         test_get_files_in_directory();
@@ -322,6 +348,7 @@ int main(int argc, char *argv[]) {
         test_var_tmp();
         test_chase_symlinks();
         test_dot_or_dot_dot();
+        test_access_fd();
 
         return 0;
 }