diff --git a/fltk b/fltk
index a333817..5c6ec56 160000
--- a/fltk
+++ b/fltk
@@ -1 +1 @@
-Subproject commit a333817f4178d944685fc787bd389097e8d85aca
+Subproject commit 5c6ec56b33d9eb5a9261eb72128d86f8e6ff5305
diff --git a/include/cfl_valuator.h b/include/cfl_valuator.h
index 24ec0b8..92cc700 100644
--- a/include/cfl_valuator.h
+++ b/include/cfl_valuator.h
@@ -34,6 +34,8 @@ int Fl_Slider_slider_box(const Fl_Slider *self);
 
 void Fl_Slider_set_slider_box(Fl_Slider *self, int c);
 
+int Fl_Slider_scroll_value(Fl_Slider *self, int pos, int windowSize, int first_line, int total_lines);
+
 VALUATOR_DECLARE(Fl_Slider)
 
 WIDGET_DECLARE(Fl_Nice_Slider)
@@ -70,6 +72,8 @@ void Fl_Scrollbar_set_linesize(Fl_Scrollbar *self, int sz);
 
 int Fl_Scrollbar_linesize(const Fl_Scrollbar *self);
 
+int Fl_Scrollbar_scroll_value(Fl_Scrollbar *self, int pos, int windowSize, int first_line, int total_lines);
+
 VALUATOR_DECLARE(Fl_Scrollbar)
 
 WIDGET_DECLARE(Fl_Value_Slider)
diff --git a/src/cfl_valuator.cpp b/src/cfl_valuator.cpp
index 848fd97..83abd10 100644
--- a/src/cfl_valuator.cpp
+++ b/src/cfl_valuator.cpp
@@ -104,6 +104,11 @@ void Fl_Slider_set_slider_box(Fl_Slider *self, int c) {
     LOCK(self->slider((Fl_Boxtype)c));
 }
 
+int Fl_Slider_scroll_value(Fl_Slider *self, int pos, int windowSize, int first_line, int total_lines) {
+    LOCK(auto ret = self->scrollvalue(pos, windowSize, first_line, total_lines));
+    return ret;
+}
+
 VALUATOR_DEFINE(Fl_Slider)
 
 WIDGET_CLASS(Fl_Nice_Slider)
@@ -167,6 +172,11 @@ int Fl_Scrollbar_linesize(const Fl_Scrollbar *self) {
     return ret;
 }
 
+int Fl_Scrollbar_scroll_value(Fl_Scrollbar *self, int pos, int windowSize, int first_line, int total_lines) {
+    LOCK(auto ret = self->value(pos, windowSize, first_line, total_lines));
+    return ret;
+}
+
 VALUATOR_DEFINE(Fl_Scrollbar)
 
 WIDGET_CLASS(Fl_Value_Slider)