diff --git a/plugins/git4idea/src/git4idea/branch/GitBranchesCollection.java b/plugins/git4idea/src/git4idea/branch/GitBranchesCollection.java
index d7a768516606..d4802f2310d4 100644
--- a/plugins/git4idea/src/git4idea/branch/GitBranchesCollection.java
+++ b/plugins/git4idea/src/git4idea/branch/GitBranchesCollection.java
@@ -19,8 +19,9 @@ import git4idea.GitBranch;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
-import java.util.Set;
 
 /**
  * <p>
@@ -35,13 +36,13 @@ import java.util.Set;
  */
 public final class GitBranchesCollection {
   
-  public static final GitBranchesCollection EMPTY = new GitBranchesCollection(null, new HashSet<GitBranch>(), new HashSet<GitBranch>());
+  public static final GitBranchesCollection EMPTY = new GitBranchesCollection(null, Collections.<GitBranch>emptyList(), Collections.<GitBranch>emptyList());
 
-  private final Set<GitBranch> myLocalBranches;
-  private final Set<GitBranch> myRemoteBranches;
+  private final Collection<GitBranch> myLocalBranches;
+  private final Collection<GitBranch> myRemoteBranches;
   private final GitBranch myCurrentBranch;
 
-  public GitBranchesCollection(@Nullable GitBranch currentBranch, @NotNull Set<GitBranch> localBranches, @NotNull Set<GitBranch> remoteBranches) {
+  public GitBranchesCollection(@Nullable GitBranch currentBranch, @NotNull Collection<GitBranch> localBranches, @NotNull Collection<GitBranch> remoteBranches) {
     myCurrentBranch = currentBranch;
     myRemoteBranches = remoteBranches;
     myLocalBranches = localBranches;
@@ -58,7 +59,7 @@ public final class GitBranchesCollection {
    * @return the copy of local branches set.
    */
   @NotNull
-  public Set<GitBranch> getLocalBranches() {
+  public Collection<GitBranch> getLocalBranches() {
     return new HashSet<GitBranch>(myLocalBranches);
   }
 
@@ -66,7 +67,7 @@ public final class GitBranchesCollection {
    * @return the copy of remote branches set.
    */
   @NotNull
-  public Set<GitBranch> getRemoteBranches() {
+  public Collection<GitBranch> getRemoteBranches() {
     return new HashSet<GitBranch>(myRemoteBranches);
   }
 
diff --git a/plugins/git4idea/src/git4idea/history/browser/LowLevelAccessImpl.java b/plugins/git4idea/src/git4idea/history/browser/LowLevelAccessImpl.java
index 8e9100451e7f..b1fed80b208c 100644
--- a/plugins/git4idea/src/git4idea/history/browser/LowLevelAccessImpl.java
+++ b/plugins/git4idea/src/git4idea/history/browser/LowLevelAccessImpl.java
@@ -117,11 +117,11 @@ public class LowLevelAccessImpl implements LowLevelAccess {
     final GitRepository repositoryForRoot = GitRepositoryManager.getInstance(myProject).getRepositoryForRoot(myRoot);
     if (repositoryForRoot != null) {
       final GitBranchesCollection branches = repositoryForRoot.getBranches();
-      final Set<GitBranch> localBranches = branches.getLocalBranches();
+      final Collection<GitBranch> localBranches = branches.getLocalBranches();
       for (GitBranch localBranch : localBranches) {
         refs.addLocal(localBranch.getName());
       }
-      final Set<GitBranch> remoteBranches = branches.getRemoteBranches();
+      final Collection<GitBranch> remoteBranches = branches.getRemoteBranches();
       for (GitBranch remoteBranch : remoteBranches) {
         String name = remoteBranch.getName();
         name = name.startsWith("remotes/") ? name.substring("remotes/".length()) : name;