diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 78e18e3b94..366f36645a 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -284,7 +284,7 @@ _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
         return 0;
 }
 
-_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
+_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const *argv) {
         _cleanup_strv_free_ char **a = NULL;
         int r;
 
diff --git a/src/systemd/sd-bus.h b/src/systemd/sd-bus.h
index cd307dbd56..6f72e4b3b2 100644
--- a/src/systemd/sd-bus.h
+++ b/src/systemd/sd-bus.h
@@ -143,7 +143,7 @@ int sd_bus_new(sd_bus **ret);
 
 int sd_bus_set_address(sd_bus *bus, const char *address);
 int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd);
-int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]);
+int sd_bus_set_exec(sd_bus *bus, const char *path, char *const *argv);
 int sd_bus_get_address(sd_bus *bus, const char **address);
 int sd_bus_set_bus_client(sd_bus *bus, int b);
 int sd_bus_is_bus_client(sd_bus *bus);