diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index 1025a639d..4bd85451f 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -1486,10 +1486,10 @@ void AddBerserk(Sint32 mi, Sint32 sx, Sint32 sy, Sint32 dx, Sint32 dy, Sint32 mi
 										j = 6;
 										auto slvl = static_cast<double>(GetSpellLevel(id, SPL_BERSERK));
 										monster[dm]._mFlags |= MFLAG_BERSERK | MFLAG_GOLEM;
-										monster[dm].mMinDamage = ((double)(GenerateRnd(10) + 20) / 100 - -1) * (double)monster[dm].mMinDamage + slvl;
-										monster[dm].mMaxDamage = ((double)(GenerateRnd(10) + 20) / 100 - -1) * (double)monster[dm].mMaxDamage + slvl;
-										monster[dm].mMinDamage2 = ((double)(GenerateRnd(10) + 20) / 100 - -1) * (double)monster[dm].mMinDamage2 + slvl;
-										monster[dm].mMaxDamage2 = ((double)(GenerateRnd(10) + 20) / 100 - -1) * (double)monster[dm].mMaxDamage2 + slvl;
+										monster[dm].mMinDamage = ((double)(GenerateRnd(10) + 20) / 100 + 1) * (double)monster[dm].mMinDamage + slvl;
+										monster[dm].mMaxDamage = ((double)(GenerateRnd(10) + 20) / 100 + 1) * (double)monster[dm].mMaxDamage + slvl;
+										monster[dm].mMinDamage2 = ((double)(GenerateRnd(10) + 20) / 100 + 1) * (double)monster[dm].mMinDamage2 + slvl;
+										monster[dm].mMaxDamage2 = ((double)(GenerateRnd(10) + 20) / 100 + 1) * (double)monster[dm].mMaxDamage2 + slvl;
 										if (currlevel < 17 || currlevel > 20)
 											r = 3;
 										else