diff --git a/src/engine/gameManager/ZergManager.java b/src/engine/gameManager/ZergManager.java
index 04e545fd..069f8175 100644
--- a/src/engine/gameManager/ZergManager.java
+++ b/src/engine/gameManager/ZergManager.java
@@ -253,7 +253,7 @@ public class ZergManager {
         float returnMultiplier = 1.0f;
         if(source.ZergMultiplier > 0 && target.ZergMultiplier > 0){
             if(source.ZergMultiplier > target.ZergMultiplier) {
-                returnMultiplier =  1 + (target.ZergMultiplier - source.ZergMultiplier);
+                returnMultiplier =  1 + (source.ZergMultiplier - target.ZergMultiplier);
             } else{
                 returnMultiplier =  1.0f;
             }
diff --git a/src/engine/workthreads/HourlyJobThread.java b/src/engine/workthreads/HourlyJobThread.java
index a29bd839..24bc76a6 100644
--- a/src/engine/workthreads/HourlyJobThread.java
+++ b/src/engine/workthreads/HourlyJobThread.java
@@ -158,6 +158,12 @@ public class HourlyJobThread implements Runnable {
             return false;
         }
 
+        for(Integer id : mine._playerMemory ){
+            PlayerCharacter.getPlayerCharacter(id).ZergMultiplier = 1.0f;
+        }
+        for(Integer id : mine._recentMemory.keySet()){
+            PlayerCharacter.getPlayerCharacter(id).ZergMultiplier = 1.0f;
+        }
         // Mine building still stands; nothing to do.
         // We can early exit here.