diff --git a/source/games/exhumed/src/aistuff.h b/source/games/exhumed/src/aistuff.h
index 3a1101f6b..82f1c5247 100644
--- a/source/games/exhumed/src/aistuff.h
+++ b/source/games/exhumed/src/aistuff.h
@@ -166,7 +166,7 @@ void DoRegenerates();
 // lavadude
 
 void BuildLava(DExhumedActor* nSprite, const DVector3& pos, sectortype* pSector, DAngle nAngle, int nChannel);
-DExhumedActor* BuildLavaLimb(DExhumedActor* nSprite, int edx, int ebx);
+DExhumedActor* BuildLavaLimb(DExhumedActor* nSprite, int edx, double ebx);
 void FuncLavaLimb(int, int, int, int);
 void FuncLava(int, int, int, int);
 
diff --git a/source/games/exhumed/src/engine.h b/source/games/exhumed/src/engine.h
index 333e35ece..6dd2c0bc6 100644
--- a/source/games/exhumed/src/engine.h
+++ b/source/games/exhumed/src/engine.h
@@ -123,6 +123,7 @@ int RandomLong();
 int RandomSize(int nSize);
 DAngle RandomAngle9();
 DAngle RandomAngle();
+double RandomFloat(double range);
 
 // record
 
diff --git a/source/games/exhumed/src/lavadude.cpp b/source/games/exhumed/src/lavadude.cpp
index d50f60a80..7ef26677b 100644
--- a/source/games/exhumed/src/lavadude.cpp
+++ b/source/games/exhumed/src/lavadude.cpp
@@ -37,11 +37,11 @@ static actionSeq LavadudeSeq[] = {
     {42, 1}
 };
 
-DExhumedActor* BuildLavaLimb(DExhumedActor* pActor, int move, int ebx)
+DExhumedActor* BuildLavaLimb(DExhumedActor* pActor, int move, double height)
 {
     auto pLimbActor = insertActor(pActor->sector(), 118);
 
-    pLimbActor->spr.pos = pActor->spr.pos.plusZ((-RandomLong() % ebx) * zmaptoworld);
+    pLimbActor->spr.pos = pActor->spr.pos.plusZ(-RandomFloat(height));
     pLimbActor->spr.cstat = 0;
     pLimbActor->spr.shade = -127;
     pLimbActor->spr.pal = 1;
@@ -205,7 +205,7 @@ void AILavaDude::Damage(RunListEvent* ev)
             }
         }
 
-        BuildLavaLimb(pActor, totalmoves, 64000);
+        BuildLavaLimb(pActor, totalmoves, 250);
     }
 }
 
@@ -371,7 +371,7 @@ void AILavaDude::Tick(RunListEvent* ev)
     {
         if (nFlag & 0x40)
         {
-            auto pLimbSprite = BuildLavaLimb(pActor, pActor->nFrame, 64000);
+            auto pLimbSprite = BuildLavaLimb(pActor, pActor->nFrame, 250);
             D3PlayFX(StaticSound[kSound26], pLimbSprite);
         }
 
@@ -382,7 +382,7 @@ void AILavaDude::Tick(RunListEvent* ev)
                 int ecx = 0;
                 do
                 {
-                    BuildLavaLimb(pActor, ecx, 64000);
+                    BuildLavaLimb(pActor, ecx, 250);
                     ecx++;
                 } while (ecx < 20);
                 runlist_ChangeChannel(pActor->nCount, 1);
@@ -394,7 +394,7 @@ void AILavaDude::Tick(RunListEvent* ev)
 
             do
             {
-                BuildLavaLimb(pActor, ecx, 256);
+                BuildLavaLimb(pActor, ecx, 1);
                 ecx++;
             } while (ecx < 30);
 
diff --git a/source/games/exhumed/src/queen.cpp b/source/games/exhumed/src/queen.cpp
index 9b91ad04a..5b7806c34 100644
--- a/source/games/exhumed/src/queen.cpp
+++ b/source/games/exhumed/src/queen.cpp
@@ -349,7 +349,7 @@ int DestroyTailPart()
 
     for (int i = 0; i < 5; i++)
     {
-        int nHeight = GetActorHeight(pActor);
+        double nHeight = GetActorHeightF(pActor);
         BuildLavaLimb(pActor, i, nHeight);
     }
 
@@ -945,7 +945,7 @@ void AIQueenHead::Tick(RunListEvent* ev)
                     if (QueenHead.nIndex2 < 10) {
                         for (int i = (10 - QueenHead.nIndex2) * 2; i > 0; i--)
                         {
-                            BuildLavaLimb(pActor, i, GetActorHeight(pActor));
+                            BuildLavaLimb(pActor, i, GetActorHeightF(pActor));
                         }
                     }
                 }
@@ -963,7 +963,7 @@ void AIQueenHead::Tick(RunListEvent* ev)
 
                 for (i = 0; i < 20; i++)
                 {
-                    BuildLavaLimb(pActor, i, GetActorHeight(pActor));
+                    BuildLavaLimb(pActor, i, GetActorHeightF(pActor));
                 }
 
                 runlist_SubRunRec(pActor->spr.intowner);
diff --git a/source/games/exhumed/src/random.cpp b/source/games/exhumed/src/random.cpp
index 4b6aea96d..394ea88a8 100644
--- a/source/games/exhumed/src/random.cpp
+++ b/source/games/exhumed/src/random.cpp
@@ -79,6 +79,11 @@ int RandomLong()
     return randLong;
 }
 
+double RandomFloat(double range)
+{
+    return RandomWord() * range / 0xffff;
+}
+
 int RandomSize(int nSize)
 {
     int randSize = 0;