diff --git a/server/src/main/java/com/metamx/druid/loading/OmniSegmentLoader.java b/server/src/main/java/com/metamx/druid/loading/OmniSegmentLoader.java
index 38b811ca179..ffe419246ed 100644
--- a/server/src/main/java/com/metamx/druid/loading/OmniSegmentLoader.java
+++ b/server/src/main/java/com/metamx/druid/loading/OmniSegmentLoader.java
@@ -211,7 +211,7 @@ public class OmniSegmentLoader implements SegmentLoader
 
     private synchronized void addSegment(DataSegment segment)
     {
-      if (! segments.add(segment)) {
+      if (segments.add(segment)) {
         currSize += segment.getSize();
       }
     }
diff --git a/server/src/main/java/com/metamx/druid/loading/SingleSegmentLoader.java b/server/src/main/java/com/metamx/druid/loading/SingleSegmentLoader.java
index a9fe23d1af6..e7aa60d4bff 100644
--- a/server/src/main/java/com/metamx/druid/loading/SingleSegmentLoader.java
+++ b/server/src/main/java/com/metamx/druid/loading/SingleSegmentLoader.java
@@ -210,7 +210,7 @@ public class SingleSegmentLoader implements SegmentLoader
 
     private synchronized void addSegment(DataSegment segment)
     {
-      if (! segments.add(segment)) {
+      if (segments.add(segment)) {
         currSize += segment.getSize();
       }
     }