diff --git a/.gitignore b/.gitignore
index e056d115a..425a4922b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,9 @@ src/commands/libcommands.a
 src/columns/libcolumns.a
 *~
 .*.swp
+Session.vim
 package-config/osx/binary/task
+/build/
 CMakeFiles
 CMakeCache.txt
 cmake_install.cmake
diff --git a/src/commands/CmdTags.cpp b/src/commands/CmdTags.cpp
index 1e387e319..adf298900 100644
--- a/src/commands/CmdTags.cpp
+++ b/src/commands/CmdTags.cpp
@@ -166,7 +166,7 @@ int CmdCompletionTags::execute (std::string& output)
   // Apply filter.
   Filter filter;
   std::vector <Task> filtered;
-  filter.subset (filtered);
+  filter.subset (tasks, filtered);
 
   // Scan all the tasks for their tags, building a map using tag
   // names as keys.