--- a/widget/gonk/libdisplay/BootAnimation.cpp
+++ b/widget/gonk/libdisplay/BootAnimation.cpp
@@ -11,16 +11,17 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #include <algorithm>
 #include <endian.h>
 #include <fcntl.h>
+#include <pthread.h>
 #include <string>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <vector>
 #include "mozilla/FileUtils.h"
 #include "png.h"
 
 #include "android/log.h"
@@ -596,17 +597,17 @@ AnimationThread(void *)
         snprintf(search, sizeof(search), "%s/", part.path);
         while ((entry = reader.GetNextEntry(entry))) {
             string name = reader.GetEntryName(entry);
             if (name.find(search) ||
                 !entry->GetDataSize() ||
                 name.length() >= 256)
                 continue;
 
-            part.frames.push_back();
+            part.frames.resize(part.frames.size() + 1);
             AnimationFrame &frame = part.frames.back();
             strcpy(frame.path, name.c_str());
             frame.file = reader.GetLocalEntry(entry);
         }
 
         sort(part.frames.begin(), part.frames.end());
     }