diff --git a/headers/os/interface/ScrollBar.h b/headers/os/interface/ScrollBar.h
index 557d11c118..fb3d37e2be 100644
--- a/headers/os/interface/ScrollBar.h
+++ b/headers/os/interface/ScrollBar.h
@@ -12,10 +12,6 @@
 #define B_V_SCROLL_BAR_WIDTH	14.0f
 #define B_H_SCROLL_BAR_HEIGHT	14.0f
 
-// TODO: shouldn't these be moved into the implementation?
-#define SCROLL_BAR_MAXIMUM_KNOB_SIZE	50
-#define SCROLL_BAR_MINIMUM_KNOB_SIZE	9
-
 #define DISABLES_ON_WINDOW_DEACTIVATION 1
 
 
diff --git a/src/kits/interface/ScrollBar.cpp b/src/kits/interface/ScrollBar.cpp
index 2ad9d659d8..ab5077d640 100644
--- a/src/kits/interface/ScrollBar.cpp
+++ b/src/kits/interface/ScrollBar.cpp
@@ -45,6 +45,9 @@ typedef enum {
 } arrow_direction;
 
 
+#define SCROLL_BAR_MAXIMUM_KNOB_SIZE	50
+#define SCROLL_BAR_MINIMUM_KNOB_SIZE	9
+
 #define SBC_SCROLLBYVALUE	0
 #define SBC_SETDOUBLE		1
 #define SBC_SETPROPORTIONAL	2