diff --git a/src/core/namespace.c b/src/core/namespace.c
index c2215090a9..ab03aebf5b 100644
--- a/src/core/namespace.c
+++ b/src/core/namespace.c
@@ -424,9 +424,9 @@ int setup_namespace(
                 char** read_write_dirs,
                 char** read_only_dirs,
                 char** inaccessible_dirs,
-                char* tmp_dir,
-                char* var_tmp_dir,
-                char* bus_endpoint_path,
+                const char* tmp_dir,
+                const char* var_tmp_dir,
+                const char* bus_endpoint_path,
                 bool private_dev,
                 ProtectHome protect_home,
                 ProtectSystem protect_system,
diff --git a/src/core/namespace.h b/src/core/namespace.h
index 9cd420e958..1f9d0676b4 100644
--- a/src/core/namespace.h
+++ b/src/core/namespace.h
@@ -44,9 +44,9 @@ typedef enum ProtectSystem {
 int setup_namespace(char **read_write_dirs,
                     char **read_only_dirs,
                     char **inaccessible_dirs,
-                    char *tmp_dir,
-                    char *var_tmp_dir,
-                    char *endpoint_path,
+                    const char *tmp_dir,
+                    const char *var_tmp_dir,
+                    const char *endpoint_path,
                     bool private_dev,
                     ProtectHome protect_home,
                     ProtectSystem protect_system,