diff --git a/execute.c b/execute.c
index 5ac5eefd33..a82d016cbc 100644
--- a/execute.c
+++ b/execute.c
@@ -91,7 +91,7 @@ static int shift_fds(int fds[], unsigned n_fds) {
         return 0;
 }
 
-static int flags_fds(int fds[], unsigned n_fds, bool nonblock) {
+static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
         unsigned i;
         int r;
 
@@ -667,7 +667,7 @@ static int enforce_user(const ExecContext *context, uid_t uid) {
 
 int exec_spawn(ExecCommand *command,
                const ExecContext *context,
-               int *fds, unsigned n_fds,
+               int fds[], unsigned n_fds,
                bool apply_permissions,
                bool apply_chroot,
                bool confirm_spawn,
diff --git a/execute.h b/execute.h
index d2ac4a82e0..0ed3ecd780 100644
--- a/execute.h
+++ b/execute.h
@@ -164,7 +164,7 @@ typedef enum ExitStatus {
 
 int exec_spawn(ExecCommand *command,
                const ExecContext *context,
-               int *fds, unsigned n_fds,
+               int fds[], unsigned n_fds,
                bool apply_permissions,
                bool apply_chroot,
                bool confirm_spawn,