diff -r 7f2a4c387292 -r 688cad3f6090 include/SDL_haptic.h
--- a/include/SDL_haptic.h	Fri Jul 18 18:58:47 2008 +0000
+++ b/include/SDL_haptic.h	Fri Jul 18 19:16:03 2008 +0000
@@ -602,6 +602,9 @@
  *  Neither delay, interval, attack_length nor fade_length support 
  *  SDL_HAPTIC_INFINITY.  Fade will also not be used since effect never ends.
  *
+ * Additionally, the SDL_HAPTIC_RAMP effect does not support a duration of
+ *  SDL_HAPTIC_INFINITY.
+ *
  * Common parts:
  * \code
  * // Replay - All effects have this