diff --git a/source/backend/plugin/CarlaPluginJSFX.cpp b/source/backend/plugin/CarlaPluginJSFX.cpp
index fe5a24f4f..cd6e55a41 100644
--- a/source/backend/plugin/CarlaPluginJSFX.cpp
+++ b/source/backend/plugin/CarlaPluginJSFX.cpp
@@ -840,6 +840,7 @@ public:
         fFileAPI = new CarlaJsusFxFileAPI;
         fEffect = new CarlaJsusFx(*fPathLibrary);
         fEffect->fileAPI = fFileAPI;
+        fFileAPI->init(fEffect->m_vm);
         fFilename.assign(filename);
 
         // ---------------------------------------------------------------
diff --git a/source/discovery/carla-discovery.cpp b/source/discovery/carla-discovery.cpp
index 474ca91ef..e5e439925 100644
--- a/source/discovery/carla-discovery.cpp
+++ b/source/discovery/carla-discovery.cpp
@@ -1673,6 +1673,16 @@ static void do_jsfx_check(const char* const filename, bool doInit)
 
     uint hints = 0;
 
+    ///
+    JsusFxFileAPI_Basic fileAPI;
+    effect.fileAPI = &fileAPI;
+    fileAPI.init(effect.m_vm);
+
+    JsusFxGfx gfxAPI;
+    effect.gfx = &gfxAPI;
+    gfxAPI.init(effect.m_vm);
+
+    ///
     if (doInit)
     {
         int compileFlags =
diff --git a/source/utils/CarlaJsfxUtils.hpp b/source/utils/CarlaJsfxUtils.hpp
index 63353312d..5b7d8c26c 100644
--- a/source/utils/CarlaJsfxUtils.hpp
+++ b/source/utils/CarlaJsfxUtils.hpp
@@ -30,6 +30,7 @@
 #pragma GCC diagnostic ignored "-Wignored-attributes"
 #include "jsusfx.h"
 #include "jsusfx_file.h"
+#include "jsusfx_gfx.h"
 #include "jsusfx_serialize.h"
 #pragma GCC diagnostic pop