diff --git a/constants.h b/constants.h
index 77828c7..a3af8c1 100644
--- a/constants.h
+++ b/constants.h
@@ -267,7 +267,12 @@
 #endif
 
 #define SFG_PLAYER_JUMP_OFFSET_PER_FRAME \
-  ((SFG_PLAYER_JUMP_SPEED * RCL_UNITS_PER_SQUARE) / SFG_FPS)
+  (((SFG_PLAYER_JUMP_SPEED * RCL_UNITS_PER_SQUARE) / SFG_FPS) \
+  - SFG_GRAVITY_SPEED_INCREASE_PER_FRAME / 2) 
+  /* ^ This substraction corrects the initial veloc. so that the numeric curve
+     copies the analytical (smooth) curve. Without it the numeric curve goes
+     ABOVE and makes player jump higher with lower FPS. To make sense of this
+     try to solve the differential equation and plot it. */
 
 #if SFG_PLAYER_JUMP_OFFSET_PER_FRAME == 0
   #define SFG_PLAYER_JUMP_OFFSET_PER_FRAME 1