--- rxvt-unicode/src/scrollbar.h	2007/12/29 14:48:44	1.4
+++ rxvt-unicode/src/scrollbar.h	2007/12/29 14:52:55	1.5
@@ -28,7 +28,7 @@
 #define scrollbar_isMotion()    (scrollBar.state == 'm')
 #define scrollbar_isUp()        (scrollBar.state == 'U')
 #define scrollbar_isDn()        (scrollBar.state == 'D')
-#define scrollbar_isUpDn()      isupper (scrollBar.state)
+#define scrollbar_isUpDn()      (scrollbar_isUp () || scrollbar_isDn ())
 #define isScrollbarWindow(w)    (scrollBar.state && (w) == scrollBar.win)
 
 #define scrollbarnext_dnval()   (scrollBar.end + (scrollBar.width + 1))