diff --git a/src/poison_health.cc b/src/poison_health.cc
index e4847f7..7bb6c95 100644
--- a/src/poison_health.cc
+++ b/src/poison_health.cc
@@ -14,7 +14,7 @@ void poison_health::apply(const enum race &race, int &HP, int &ATK, int &DEF,
                 if (race == DROW)
                         tmp *= DROW_POTION_MUL;
 
-                HP = std::max(HP - tmp, 1);
+                HP = std::max(HP - tmp, 0);
                 --remaining_duration;
         }
 }