diff --git a/plugins/zynaddsubfx/fltk/FL/Fl_Menu_Item.H b/plugins/zynaddsubfx/fltk/FL/Fl_Menu_Item.H
index 80ee5b272..33e520a67 100644
--- a/plugins/zynaddsubfx/fltk/FL/Fl_Menu_Item.H
+++ b/plugins/zynaddsubfx/fltk/FL/Fl_Menu_Item.H
@@ -88,7 +88,7 @@ struct FL_EXPORT Fl_Menu_Item {
   void callback(Fl_Callback1*c, long p=0) {callback_=(Fl_Callback*)c; user_data_=(void*)p;}
   void* user_data() const {return user_data_;}
   void user_data(void* v) {user_data_ = v;}
-  long argument() const {return (long long)user_data_;}
+  long argument() const {return (long)user_data_;}
   void argument(long v) {user_data_ = (void*)v;}
   int shortcut() const {return shortcut_;}
   void shortcut(int s) {shortcut_ = s;}
diff --git a/plugins/zynaddsubfx/fltk/FL/Fl_Widget.H b/plugins/zynaddsubfx/fltk/FL/Fl_Widget.H
index 9125a5762..09f93eccb 100644
--- a/plugins/zynaddsubfx/fltk/FL/Fl_Widget.H
+++ b/plugins/zynaddsubfx/fltk/FL/Fl_Widget.H
@@ -155,7 +155,7 @@ public:
   void callback(Fl_Callback1*c, long p=0) {callback_=(Fl_Callback*)c; user_data_=(void*)p;}
   void* user_data() const {return user_data_;}
   void user_data(void* v) {user_data_ = v;}
-  long argument() const {return (long long)user_data_;}
+  long argument() const {return (long)user_data_;}
   void argument(long v) {user_data_ = (void*)v;}
   Fl_When when() const {return (Fl_When)when_;}
   void when(uchar i) {when_ = i;}
diff --git a/plugins/zynaddsubfx/fltk/src/fl_open_uri.cxx b/plugins/zynaddsubfx/fltk/src/fl_open_uri.cxx
index a8eff89e0..f8a9cd7ee 100644
--- a/plugins/zynaddsubfx/fltk/src/fl_open_uri.cxx
+++ b/plugins/zynaddsubfx/fltk/src/fl_open_uri.cxx
@@ -114,7 +114,7 @@ fl_open_uri(const char *uri, char *msg, int msglen) {
 #ifdef WIN32
   if (msg) snprintf(msg, msglen, "open %s", uri);
 
-  return (long long)ShellExecute(HWND_DESKTOP, "open", uri, NULL, NULL, SW_SHOW) > 32;
+  return (int)ShellExecute(HWND_DESKTOP, "open", uri, NULL, NULL, SW_SHOW) > 32;
 
 #elif defined(__APPLE__)
   char	*argv[3];			// Command-line arguments