diff --git a/filesystem/filesystem.c b/filesystem/filesystem.c
index a363cf04..c7f82d29 100644
--- a/filesystem/filesystem.c
+++ b/filesystem/filesystem.c
@@ -2999,7 +2999,7 @@ static qboolean FS_InitInterface( int version, fs_interface_t *engfuncs )
 	return true;
 }
 
-fs_api_t g_api =
+const fs_api_t g_api =
 {
 	FS_InitStdio,
 	FS_ShutdownStdio,
diff --git a/filesystem/filesystem_internal.h b/filesystem/filesystem_internal.h
index e2531177..315a10a0 100644
--- a/filesystem/filesystem_internal.h
+++ b/filesystem/filesystem_internal.h
@@ -123,7 +123,7 @@ extern fs_interface_t g_engfuncs;
 extern qboolean      fs_ext_path;
 extern char          fs_rodir[MAX_SYSPATH];
 extern char          fs_rootdir[MAX_SYSPATH];
-extern fs_api_t      g_api;
+extern const fs_api_t     g_api;
 extern const fs_archive_t g_archives[];
 
 #define GI FI.GameInfo