diff --git a/src/battle_interface.c b/src/battle_interface.c
index c35e9f974..2ac611f83 100644
--- a/src/battle_interface.c
+++ b/src/battle_interface.c
@@ -2439,7 +2439,7 @@ s32 MoveBattleBar(u8 battlerId, u8 healthboxSpriteId, u8 whichBar, u8 unused)
                     gBattleSpritesDataPtr->battleBars[battlerId].receivedValue,
                     &gBattleSpritesDataPtr->battleBars[battlerId].currValue,
                 #if B_FAST_HP_DRAIN == TRUE
-                    B_HEALTHBAR_PIXELS / 8, max(gBattleSpritesDataPtr->battleBars[battlerId].maxValue / 64, 1));
+                    B_HEALTHBAR_PIXELS / 8, max(gBattleSpritesDataPtr->battleBars[battlerId].maxValue / B_HEALTHBAR_PIXELS, 1));
                 #else
                     B_HEALTHBAR_PIXELS / 8, 1);
                 #endif